./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 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_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0214_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:08:53,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:08:53,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:08:53,886 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:08:53,887 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:08:53,888 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:08:53,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:08:53,891 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:08:53,893 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:08:53,894 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:08:53,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:08:53,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:08:53,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:08:53,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:08:53,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:08:53,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:08:53,900 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:08:53,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:08:53,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:08:53,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:08:53,906 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:08:53,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:08:53,910 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:08:53,911 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:08:53,914 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:08:53,914 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:08:53,914 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:08:53,915 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:08:53,916 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:08:53,917 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:08:53,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:08:53,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:08:53,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:08:53,920 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:08:53,921 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:08:53,921 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:08:53,922 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:08:53,922 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:08:53,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:08:53,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:08:53,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:08:53,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:08:53,983 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:08:53,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:08:53,983 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:08:53,984 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:08:53,984 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:08:53,984 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:08:53,985 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:08:53,985 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:08:53,985 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:08:53,985 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:08:53,985 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:08:53,985 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:08:53,986 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:08:53,986 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:08:53,986 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:08:53,986 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:08:53,986 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:08:53,987 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:08:53,991 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:08:53,991 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:08:53,991 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:08:53,992 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:08:53,992 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:08:53,992 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:08:53,992 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:08:53,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:08:53,993 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:08:53,993 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:08:53,994 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:08:53,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:08:53,994 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:08:53,995 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:08:53,995 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:08:53,995 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:08:53,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:08:53,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:08:53,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:08:53,997 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:08:53,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:08:53,998 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:08:53,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:08:53,998 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:08:53,998 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_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8cac36e956b24d42ea840a07609fb159882a2e76b1195da25a4d4343e0b31026 [2022-11-23 14:08:54,350 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:08:54,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:08:54,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:08:54,379 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:08:54,380 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:08:54,381 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-23 14:08:57,456 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:08:57,781 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:08:57,781 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/sv-benchmarks/c/list-ext-properties/test-0214_1.i [2022-11-23 14:08:57,819 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/data/0b271d6e1/1601c0a03d094d4dae09e3679457706c/FLAG824619849 [2022-11-23 14:08:57,841 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/data/0b271d6e1/1601c0a03d094d4dae09e3679457706c [2022-11-23 14:08:57,844 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:08:57,847 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:08:57,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:08:57,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:08:57,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:08:57,857 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:57" (1/1) ... [2022-11-23 14:08:57,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4b8086 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:57, skipping insertion in model container [2022-11-23 14:08:57,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:08:57" (1/1) ... [2022-11-23 14:08:57,867 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:08:57,919 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:08:58,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:08:58,376 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:08:58,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:08:58,462 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:08:58,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58 WrapperNode [2022-11-23 14:08:58,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:08:58,464 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:08:58,464 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:08:58,464 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:08:58,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,522 INFO L138 Inliner]: procedures = 181, calls = 43, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 215 [2022-11-23 14:08:58,522 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:08:58,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:08:58,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:08:58,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:08:58,534 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,534 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,539 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,540 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,553 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,560 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,566 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:08:58,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:08:58,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:08:58,567 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:08:58,568 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (1/1) ... [2022-11-23 14:08:58,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:08:58,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:08:58,608 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:08:58,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:08:58,671 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-23 14:08:58,671 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-23 14:08:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:08:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:08:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:08:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 14:08:58,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 14:08:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:08:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-23 14:08:58,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:08:58,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:08:58,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:08:58,802 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:08:58,804 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:08:59,439 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:08:59,560 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:08:59,560 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 14:08:59,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:08:59 BoogieIcfgContainer [2022-11-23 14:08:59,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:08:59,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:08:59,566 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:08:59,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:08:59,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:08:57" (1/3) ... [2022-11-23 14:08:59,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6236ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:08:59, skipping insertion in model container [2022-11-23 14:08:59,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:08:58" (2/3) ... [2022-11-23 14:08:59,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6236ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:08:59, skipping insertion in model container [2022-11-23 14:08:59,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:08:59" (3/3) ... [2022-11-23 14:08:59,572 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0214_1.i [2022-11-23 14:08:59,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:08:59,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 57 error locations. [2022-11-23 14:08:59,637 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:08:59,643 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;@5a9d5eb6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:08:59,643 INFO L358 AbstractCegarLoop]: Starting to check reachability of 57 error locations. [2022-11-23 14:08:59,648 INFO L276 IsEmpty]: Start isEmpty. Operand has 123 states, 62 states have (on average 2.161290322580645) internal successors, (134), 119 states have internal predecessors, (134), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:08:59,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 14:08:59,654 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:08:59,655 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 14:08:59,655 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:08:59,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:08:59,660 INFO L85 PathProgramCache]: Analyzing trace with hash 9494517, now seen corresponding path program 1 times [2022-11-23 14:08:59,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:08:59,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190113732] [2022-11-23 14:08:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:08:59,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:08:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:08:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:08:59,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:08:59,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190113732] [2022-11-23 14:08:59,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190113732] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:08:59,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:08:59,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:08:59,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710157026] [2022-11-23 14:08:59,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:08:59,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 14:08:59,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:08:59,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 14:08:59,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 14:08:59,886 INFO L87 Difference]: Start difference. First operand has 123 states, 62 states have (on average 2.161290322580645) internal successors, (134), 119 states have internal predecessors, (134), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:08:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:08:59,958 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2022-11-23 14:08:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 14:08:59,962 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 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 4 [2022-11-23 14:08:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:08:59,971 INFO L225 Difference]: With dead ends: 123 [2022-11-23 14:08:59,971 INFO L226 Difference]: Without dead ends: 121 [2022-11-23 14:08:59,973 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 [2022-11-23 14:08:59,979 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:08:59,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 114 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:08:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-23 14:09:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-23 14:09:00,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 61 states have (on average 2.098360655737705) internal successors, (128), 117 states have internal predecessors, (128), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:09:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2022-11-23 14:09:00,028 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 4 [2022-11-23 14:09:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:00,028 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2022-11-23 14:09:00,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:00,029 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2022-11-23 14:09:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:09:00,029 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:00,030 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:09:00,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:09:00,030 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash 295854258, now seen corresponding path program 1 times [2022-11-23 14:09:00,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:00,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89465714] [2022-11-23 14:09:00,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:00,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:00,332 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:00,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89465714] [2022-11-23 14:09:00,333 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89465714] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:00,333 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:00,333 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:09:00,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429029781] [2022-11-23 14:09:00,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:00,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:09:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:09:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:09:00,336 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:00,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:00,587 INFO L93 Difference]: Finished difference Result 207 states and 226 transitions. [2022-11-23 14:09:00,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:09:00,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-23 14:09:00,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:00,589 INFO L225 Difference]: With dead ends: 207 [2022-11-23 14:09:00,589 INFO L226 Difference]: Without dead ends: 207 [2022-11-23 14:09:00,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:00,591 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 105 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:00,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 236 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:00,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-11-23 14:09:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2022-11-23 14:09:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 98 states have (on average 2.061224489795918) internal successors, (202), 155 states have internal predecessors, (202), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:09:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 210 transitions. [2022-11-23 14:09:00,606 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 210 transitions. Word has length 5 [2022-11-23 14:09:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:00,607 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 210 transitions. [2022-11-23 14:09:00,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 210 transitions. [2022-11-23 14:09:00,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-23 14:09:00,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:00,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-23 14:09:00,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:09:00,608 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:00,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:00,609 INFO L85 PathProgramCache]: Analyzing trace with hash 295854257, now seen corresponding path program 1 times [2022-11-23 14:09:00,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:00,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739853621] [2022-11-23 14:09:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:00,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:00,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:00,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739853621] [2022-11-23 14:09:00,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739853621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:00,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:00,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:09:00,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887034579] [2022-11-23 14:09:00,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:00,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:09:00,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:00,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:09:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:09:00,687 INFO L87 Difference]: Start difference. First operand 161 states and 210 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:00,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:00,939 INFO L93 Difference]: Finished difference Result 312 states and 405 transitions. [2022-11-23 14:09:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:09:00,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2022-11-23 14:09:00,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:00,943 INFO L225 Difference]: With dead ends: 312 [2022-11-23 14:09:00,943 INFO L226 Difference]: Without dead ends: 312 [2022-11-23 14:09:00,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:09:00,945 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 116 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:00,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 132 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-11-23 14:09:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 218. [2022-11-23 14:09:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 149 states have (on average 1.9798657718120805) internal successors, (295), 207 states have internal predecessors, (295), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:00,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 311 transitions. [2022-11-23 14:09:00,962 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 311 transitions. Word has length 5 [2022-11-23 14:09:00,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:00,962 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 311 transitions. [2022-11-23 14:09:00,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:00,963 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 311 transitions. [2022-11-23 14:09:00,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:09:00,963 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:00,963 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:00,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 14:09:00,964 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:00,964 INFO L85 PathProgramCache]: Analyzing trace with hash 848151012, now seen corresponding path program 1 times [2022-11-23 14:09:00,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:00,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085095552] [2022-11-23 14:09:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:00,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:00,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:00,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:00,997 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:00,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085095552] [2022-11-23 14:09:00,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085095552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:00,998 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:00,998 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 14:09:00,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120413071] [2022-11-23 14:09:00,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:00,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:09:00,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:09:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:09:01,000 INFO L87 Difference]: Start difference. First operand 218 states and 311 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:01,183 INFO L93 Difference]: Finished difference Result 277 states and 367 transitions. [2022-11-23 14:09:01,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:09:01,183 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:09:01,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:01,185 INFO L225 Difference]: With dead ends: 277 [2022-11-23 14:09:01,185 INFO L226 Difference]: Without dead ends: 276 [2022-11-23 14:09:01,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:09:01,187 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 71 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:01,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 154 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:01,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-23 14:09:01,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 219. [2022-11-23 14:09:01,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 150 states have (on average 1.9733333333333334) internal successors, (296), 208 states have internal predecessors, (296), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:01,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 312 transitions. [2022-11-23 14:09:01,209 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 312 transitions. Word has length 7 [2022-11-23 14:09:01,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:01,210 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 312 transitions. [2022-11-23 14:09:01,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:01,210 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 312 transitions. [2022-11-23 14:09:01,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:09:01,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:01,211 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:01,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:09:01,211 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:01,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:01,212 INFO L85 PathProgramCache]: Analyzing trace with hash 848149727, now seen corresponding path program 1 times [2022-11-23 14:09:01,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:01,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568132526] [2022-11-23 14:09:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:01,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:01,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:01,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:01,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568132526] [2022-11-23 14:09:01,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568132526] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:01,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:01,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:09:01,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429129220] [2022-11-23 14:09:01,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:01,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:09:01,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:09:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:09:01,298 INFO L87 Difference]: Start difference. First operand 219 states and 312 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:01,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:01,380 INFO L93 Difference]: Finished difference Result 306 states and 393 transitions. [2022-11-23 14:09:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:09:01,383 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:09:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:01,385 INFO L225 Difference]: With dead ends: 306 [2022-11-23 14:09:01,386 INFO L226 Difference]: Without dead ends: 303 [2022-11-23 14:09:01,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:09:01,392 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 109 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:01,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 223 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:09:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-11-23 14:09:01,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 217. [2022-11-23 14:09:01,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.9797297297297298) internal successors, (293), 206 states have internal predecessors, (293), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:01,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 309 transitions. [2022-11-23 14:09:01,412 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 309 transitions. Word has length 7 [2022-11-23 14:09:01,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:01,412 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 309 transitions. [2022-11-23 14:09:01,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:09:01,413 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 309 transitions. [2022-11-23 14:09:01,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:09:01,413 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:01,414 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:01,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:09:01,414 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:01,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:01,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1496074725, now seen corresponding path program 1 times [2022-11-23 14:09:01,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:01,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494477947] [2022-11-23 14:09:01,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:01,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:01,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:01,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:01,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494477947] [2022-11-23 14:09:01,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494477947] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:01,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:01,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:09:01,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544650404] [2022-11-23 14:09:01,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:01,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:09:01,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:01,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:09:01,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:09:01,538 INFO L87 Difference]: Start difference. First operand 217 states and 309 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-23 14:09:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:01,923 INFO L93 Difference]: Finished difference Result 333 states and 398 transitions. [2022-11-23 14:09:01,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:09:01,924 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2022-11-23 14:09:01,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:01,926 INFO L225 Difference]: With dead ends: 333 [2022-11-23 14:09:01,926 INFO L226 Difference]: Without dead ends: 333 [2022-11-23 14:09:01,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:01,927 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 216 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:01,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 223 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:01,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-11-23 14:09:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 217. [2022-11-23 14:09:01,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 148 states have (on average 1.9391891891891893) internal successors, (287), 206 states have internal predecessors, (287), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:01,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 303 transitions. [2022-11-23 14:09:01,936 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 303 transitions. Word has length 10 [2022-11-23 14:09:01,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:01,937 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 303 transitions. [2022-11-23 14:09:01,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-23 14:09:01,937 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 303 transitions. [2022-11-23 14:09:01,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:09:01,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:01,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:01,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:09:01,939 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:01,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1496074726, now seen corresponding path program 1 times [2022-11-23 14:09:01,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:01,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704866553] [2022-11-23 14:09:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:01,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:02,219 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:02,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704866553] [2022-11-23 14:09:02,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704866553] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:02,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:02,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:09:02,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861608624] [2022-11-23 14:09:02,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:02,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:09:02,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:02,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:09:02,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:09:02,225 INFO L87 Difference]: Start difference. First operand 217 states and 303 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-23 14:09:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:02,821 INFO L93 Difference]: Finished difference Result 402 states and 496 transitions. [2022-11-23 14:09:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:09:02,823 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 10 [2022-11-23 14:09:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:02,825 INFO L225 Difference]: With dead ends: 402 [2022-11-23 14:09:02,825 INFO L226 Difference]: Without dead ends: 402 [2022-11-23 14:09:02,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:09:02,826 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 200 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:02,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 506 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:09:02,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-23 14:09:02,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 237. [2022-11-23 14:09:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 168 states have (on average 1.9464285714285714) internal successors, (327), 224 states have internal predecessors, (327), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 343 transitions. [2022-11-23 14:09:02,838 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 343 transitions. Word has length 10 [2022-11-23 14:09:02,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:02,839 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 343 transitions. [2022-11-23 14:09:02,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2022-11-23 14:09:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 343 transitions. [2022-11-23 14:09:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:09:02,840 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:02,840 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:02,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 14:09:02,841 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:02,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:02,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1502673227, now seen corresponding path program 1 times [2022-11-23 14:09:02,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:02,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546269363] [2022-11-23 14:09:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:02,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:02,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:02,932 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:02,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546269363] [2022-11-23 14:09:02,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546269363] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:02,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:02,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:09:02,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356026972] [2022-11-23 14:09:02,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:02,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:09:02,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:02,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:09:02,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:09:02,940 INFO L87 Difference]: Start difference. First operand 237 states and 343 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-23 14:09:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:03,269 INFO L93 Difference]: Finished difference Result 398 states and 528 transitions. [2022-11-23 14:09:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:09:03,270 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2022-11-23 14:09:03,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:03,272 INFO L225 Difference]: With dead ends: 398 [2022-11-23 14:09:03,273 INFO L226 Difference]: Without dead ends: 398 [2022-11-23 14:09:03,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:03,273 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 208 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:03,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 226 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:03,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-11-23 14:09:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 243. [2022-11-23 14:09:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 174 states have (on average 1.9137931034482758) internal successors, (333), 230 states have internal predecessors, (333), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:03,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 349 transitions. [2022-11-23 14:09:03,287 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 349 transitions. Word has length 12 [2022-11-23 14:09:03,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:03,288 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 349 transitions. [2022-11-23 14:09:03,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-23 14:09:03,289 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 349 transitions. [2022-11-23 14:09:03,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:09:03,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:03,289 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:03,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 14:09:03,290 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:03,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1502673226, now seen corresponding path program 1 times [2022-11-23 14:09:03,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:03,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028962397] [2022-11-23 14:09:03,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:03,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:03,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:03,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:03,429 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:03,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028962397] [2022-11-23 14:09:03,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028962397] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:03,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:03,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:09:03,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611319837] [2022-11-23 14:09:03,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:03,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:09:03,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:03,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:09:03,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:09:03,431 INFO L87 Difference]: Start difference. First operand 243 states and 349 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-23 14:09:03,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:03,709 INFO L93 Difference]: Finished difference Result 285 states and 360 transitions. [2022-11-23 14:09:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:09:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 12 [2022-11-23 14:09:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:03,712 INFO L225 Difference]: With dead ends: 285 [2022-11-23 14:09:03,712 INFO L226 Difference]: Without dead ends: 285 [2022-11-23 14:09:03,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:03,713 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 146 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:03,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 237 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-11-23 14:09:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 243. [2022-11-23 14:09:03,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 174 states have (on average 1.8793103448275863) internal successors, (327), 230 states have internal predecessors, (327), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:03,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 343 transitions. [2022-11-23 14:09:03,726 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 343 transitions. Word has length 12 [2022-11-23 14:09:03,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:03,727 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 343 transitions. [2022-11-23 14:09:03,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-23 14:09:03,727 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 343 transitions. [2022-11-23 14:09:03,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:09:03,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:03,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:03,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:09:03,729 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:03,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:03,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1085998047, now seen corresponding path program 1 times [2022-11-23 14:09:03,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:03,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302179842] [2022-11-23 14:09:03,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:03,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:03,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:03,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302179842] [2022-11-23 14:09:03,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302179842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:03,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:03,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:09:03,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017441269] [2022-11-23 14:09:03,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:03,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:09:03,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:03,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:09:03,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:09:03,794 INFO L87 Difference]: Start difference. First operand 243 states and 343 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-11-23 14:09:03,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:03,960 INFO L93 Difference]: Finished difference Result 320 states and 419 transitions. [2022-11-23 14:09:03,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:09:03,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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 12 [2022-11-23 14:09:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:03,962 INFO L225 Difference]: With dead ends: 320 [2022-11-23 14:09:03,962 INFO L226 Difference]: Without dead ends: 320 [2022-11-23 14:09:03,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:09:03,963 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 111 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:03,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 174 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:03,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-23 14:09:03,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 240. [2022-11-23 14:09:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 174 states have (on average 1.8103448275862069) internal successors, (315), 227 states have internal predecessors, (315), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 331 transitions. [2022-11-23 14:09:03,973 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 331 transitions. Word has length 12 [2022-11-23 14:09:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:03,973 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 331 transitions. [2022-11-23 14:09:03,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 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) [2022-11-23 14:09:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 331 transitions. [2022-11-23 14:09:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-23 14:09:03,974 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:03,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:03,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 14:09:03,974 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:03,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1085998046, now seen corresponding path program 1 times [2022-11-23 14:09:03,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:03,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184835895] [2022-11-23 14:09:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:03,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:04,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:04,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184835895] [2022-11-23 14:09:04,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184835895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:04,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:04,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:09:04,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962750981] [2022-11-23 14:09:04,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:04,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:09:04,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:09:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:09:04,258 INFO L87 Difference]: Start difference. First operand 240 states and 331 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-11-23 14:09:04,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:04,577 INFO L93 Difference]: Finished difference Result 268 states and 324 transitions. [2022-11-23 14:09:04,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:09:04,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 12 [2022-11-23 14:09:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:04,579 INFO L225 Difference]: With dead ends: 268 [2022-11-23 14:09:04,579 INFO L226 Difference]: Without dead ends: 268 [2022-11-23 14:09:04,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:09:04,580 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 393 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:04,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 527 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:04,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-23 14:09:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 238. [2022-11-23 14:09:04,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 174 states have (on average 1.764367816091954) internal successors, (307), 225 states have internal predecessors, (307), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:04,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 323 transitions. [2022-11-23 14:09:04,587 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 323 transitions. Word has length 12 [2022-11-23 14:09:04,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:04,587 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 323 transitions. [2022-11-23 14:09:04,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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) [2022-11-23 14:09:04,588 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 323 transitions. [2022-11-23 14:09:04,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:09:04,588 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:04,589 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:04,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 14:09:04,589 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:04,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:04,589 INFO L85 PathProgramCache]: Analyzing trace with hash 693798951, now seen corresponding path program 1 times [2022-11-23 14:09:04,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:04,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804787582] [2022-11-23 14:09:04,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:04,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:04,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:04,889 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:04,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804787582] [2022-11-23 14:09:04,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804787582] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:04,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:04,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:09:04,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975076322] [2022-11-23 14:09:04,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:04,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:09:04,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:04,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:09:04,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:09:04,891 INFO L87 Difference]: Start difference. First operand 238 states and 323 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) 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) [2022-11-23 14:09:05,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:05,268 INFO L93 Difference]: Finished difference Result 267 states and 320 transitions. [2022-11-23 14:09:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:09:05,269 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.8333333333333333) 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 [2022-11-23 14:09:05,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:05,270 INFO L225 Difference]: With dead ends: 267 [2022-11-23 14:09:05,270 INFO L226 Difference]: Without dead ends: 267 [2022-11-23 14:09:05,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:09:05,271 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 512 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:05,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 505 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:05,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-23 14:09:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 237. [2022-11-23 14:09:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 174 states have (on average 1.7413793103448276) internal successors, (303), 224 states have internal predecessors, (303), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-23 14:09:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 319 transitions. [2022-11-23 14:09:05,278 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 319 transitions. Word has length 13 [2022-11-23 14:09:05,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:05,278 INFO L495 AbstractCegarLoop]: Abstraction has 237 states and 319 transitions. [2022-11-23 14:09:05,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.8333333333333333) 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) [2022-11-23 14:09:05,278 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 319 transitions. [2022-11-23 14:09:05,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:09:05,279 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:05,279 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:05,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-23 14:09:05,279 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:05,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:05,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1038357882, now seen corresponding path program 1 times [2022-11-23 14:09:05,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:05,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60984358] [2022-11-23 14:09:05,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:05,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:05,808 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:05,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60984358] [2022-11-23 14:09:05,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60984358] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:05,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:05,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:09:05,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316969987] [2022-11-23 14:09:05,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:05,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:09:05,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:05,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:09:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:09:05,810 INFO L87 Difference]: Start difference. First operand 237 states and 319 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-23 14:09:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:06,327 INFO L93 Difference]: Finished difference Result 327 states and 422 transitions. [2022-11-23 14:09:06,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:09:06,327 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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 16 [2022-11-23 14:09:06,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:06,329 INFO L225 Difference]: With dead ends: 327 [2022-11-23 14:09:06,329 INFO L226 Difference]: Without dead ends: 325 [2022-11-23 14:09:06,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:09:06,330 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 196 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:06,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 366 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-11-23 14:09:06,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 276. [2022-11-23 14:09:06,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 208 states have (on average 1.7163461538461537) internal successors, (357), 259 states have internal predecessors, (357), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-23 14:09:06,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 379 transitions. [2022-11-23 14:09:06,338 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 379 transitions. Word has length 16 [2022-11-23 14:09:06,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:06,338 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 379 transitions. [2022-11-23 14:09:06,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 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) [2022-11-23 14:09:06,339 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 379 transitions. [2022-11-23 14:09:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:09:06,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:06,339 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:06,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:09:06,340 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:06,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1582127119, now seen corresponding path program 1 times [2022-11-23 14:09:06,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:06,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675597484] [2022-11-23 14:09:06,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:06,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:06,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:06,633 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675597484] [2022-11-23 14:09:06,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675597484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:06,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:06,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:09:06,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245740692] [2022-11-23 14:09:06,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:06,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:09:06,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:06,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:09:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:09:06,635 INFO L87 Difference]: Start difference. First operand 276 states and 379 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-23 14:09:07,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:07,085 INFO L93 Difference]: Finished difference Result 485 states and 624 transitions. [2022-11-23 14:09:07,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:09:07,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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 16 [2022-11-23 14:09:07,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:07,088 INFO L225 Difference]: With dead ends: 485 [2022-11-23 14:09:07,088 INFO L226 Difference]: Without dead ends: 485 [2022-11-23 14:09:07,088 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:09:07,089 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 180 mSDsluCounter, 663 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 832 SdHoareTripleChecker+Invalid, 358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:07,089 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 832 Invalid, 358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:09:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2022-11-23 14:09:07,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 313. [2022-11-23 14:09:07,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 242 states have (on average 1.6983471074380165) internal successors, (411), 293 states have internal predecessors, (411), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:09:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 437 transitions. [2022-11-23 14:09:07,100 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 437 transitions. Word has length 16 [2022-11-23 14:09:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:07,101 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 437 transitions. [2022-11-23 14:09:07,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 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) [2022-11-23 14:09:07,101 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 437 transitions. [2022-11-23 14:09:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:09:07,102 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:07,102 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:07,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-23 14:09:07,103 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:07,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:07,103 INFO L85 PathProgramCache]: Analyzing trace with hash 2124685205, now seen corresponding path program 1 times [2022-11-23 14:09:07,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:07,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637988628] [2022-11-23 14:09:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:07,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:07,183 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:07,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637988628] [2022-11-23 14:09:07,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637988628] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:07,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:07,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:09:07,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395795999] [2022-11-23 14:09:07,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:07,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:09:07,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:07,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:09:07,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:09:07,186 INFO L87 Difference]: Start difference. First operand 313 states and 437 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2022-11-23 14:09:07,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:07,502 INFO L93 Difference]: Finished difference Result 461 states and 610 transitions. [2022-11-23 14:09:07,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:09:07,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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 [2022-11-23 14:09:07,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:07,505 INFO L225 Difference]: With dead ends: 461 [2022-11-23 14:09:07,505 INFO L226 Difference]: Without dead ends: 461 [2022-11-23 14:09:07,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:07,506 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 181 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:07,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 222 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2022-11-23 14:09:07,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 333. [2022-11-23 14:09:07,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.7366412213740459) internal successors, (455), 313 states have internal predecessors, (455), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:09:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 481 transitions. [2022-11-23 14:09:07,525 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 481 transitions. Word has length 17 [2022-11-23 14:09:07,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:07,527 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 481 transitions. [2022-11-23 14:09:07,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 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) [2022-11-23 14:09:07,527 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 481 transitions. [2022-11-23 14:09:07,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:09:07,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:07,529 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:07,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-23 14:09:07,529 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:07,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash 2124685206, now seen corresponding path program 1 times [2022-11-23 14:09:07,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:07,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489998417] [2022-11-23 14:09:07,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:07,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:07,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:07,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:07,737 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:07,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489998417] [2022-11-23 14:09:07,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489998417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:07,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:07,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:09:07,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603101589] [2022-11-23 14:09:07,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:07,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:09:07,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:09:07,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:07,741 INFO L87 Difference]: Start difference. First operand 333 states and 481 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2022-11-23 14:09:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:08,025 INFO L93 Difference]: Finished difference Result 376 states and 489 transitions. [2022-11-23 14:09:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:09:08,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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 [2022-11-23 14:09:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:08,028 INFO L225 Difference]: With dead ends: 376 [2022-11-23 14:09:08,028 INFO L226 Difference]: Without dead ends: 376 [2022-11-23 14:09:08,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:09:08,029 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 140 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:08,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 291 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-11-23 14:09:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 333. [2022-11-23 14:09:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 262 states have (on average 1.6793893129770991) internal successors, (440), 313 states have internal predecessors, (440), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:09:08,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 466 transitions. [2022-11-23 14:09:08,041 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 466 transitions. Word has length 17 [2022-11-23 14:09:08,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:08,041 INFO L495 AbstractCegarLoop]: Abstraction has 333 states and 466 transitions. [2022-11-23 14:09:08,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 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) [2022-11-23 14:09:08,042 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 466 transitions. [2022-11-23 14:09:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:09:08,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:08,046 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:08,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-23 14:09:08,046 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:08,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:08,047 INFO L85 PathProgramCache]: Analyzing trace with hash 6077746, now seen corresponding path program 1 times [2022-11-23 14:09:08,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:08,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574985557] [2022-11-23 14:09:08,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:08,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:08,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:08,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574985557] [2022-11-23 14:09:08,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574985557] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:08,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:08,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:09:08,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184471189] [2022-11-23 14:09:08,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:08,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:09:08,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:08,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:09:08,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:08,296 INFO L87 Difference]: Start difference. First operand 333 states and 466 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-11-23 14:09:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:08,496 INFO L93 Difference]: Finished difference Result 355 states and 459 transitions. [2022-11-23 14:09:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:09:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 18 [2022-11-23 14:09:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:08,498 INFO L225 Difference]: With dead ends: 355 [2022-11-23 14:09:08,498 INFO L226 Difference]: Without dead ends: 355 [2022-11-23 14:09:08,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:09:08,499 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 342 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:08,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 150 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-23 14:09:08,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 329. [2022-11-23 14:09:08,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 262 states have (on average 1.6488549618320612) internal successors, (432), 309 states have internal predecessors, (432), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:09:08,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 458 transitions. [2022-11-23 14:09:08,511 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 458 transitions. Word has length 18 [2022-11-23 14:09:08,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:08,511 INFO L495 AbstractCegarLoop]: Abstraction has 329 states and 458 transitions. [2022-11-23 14:09:08,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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) [2022-11-23 14:09:08,512 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 458 transitions. [2022-11-23 14:09:08,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:09:08,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:08,513 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:08,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 14:09:08,513 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:08,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:08,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1564037942, now seen corresponding path program 1 times [2022-11-23 14:09:08,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:08,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517752816] [2022-11-23 14:09:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:08,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:08,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:08,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517752816] [2022-11-23 14:09:08,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517752816] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:08,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:08,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:09:08,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204899111] [2022-11-23 14:09:08,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:08,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:09:08,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:08,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:09:08,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:09:08,717 INFO L87 Difference]: Start difference. First operand 329 states and 458 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-11-23 14:09:09,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:09,165 INFO L93 Difference]: Finished difference Result 460 states and 616 transitions. [2022-11-23 14:09:09,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:09:09,165 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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 20 [2022-11-23 14:09:09,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:09,168 INFO L225 Difference]: With dead ends: 460 [2022-11-23 14:09:09,168 INFO L226 Difference]: Without dead ends: 460 [2022-11-23 14:09:09,168 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:09:09,169 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 356 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:09,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 551 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:09,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-11-23 14:09:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 326. [2022-11-23 14:09:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 262 states have (on average 1.6106870229007633) internal successors, (422), 306 states have internal predecessors, (422), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:09:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 448 transitions. [2022-11-23 14:09:09,179 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 448 transitions. Word has length 20 [2022-11-23 14:09:09,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:09,180 INFO L495 AbstractCegarLoop]: Abstraction has 326 states and 448 transitions. [2022-11-23 14:09:09,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 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) [2022-11-23 14:09:09,180 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 448 transitions. [2022-11-23 14:09:09,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 14:09:09,181 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:09,181 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:09,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:09:09,181 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:09,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1240538813, now seen corresponding path program 1 times [2022-11-23 14:09:09,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:09,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828573717] [2022-11-23 14:09:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:09,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:09,582 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:09,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828573717] [2022-11-23 14:09:09,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828573717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:09,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:09,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:09:09,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160241753] [2022-11-23 14:09:09,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:09,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:09:09,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:09,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:09:09,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:09:09,585 INFO L87 Difference]: Start difference. First operand 326 states and 448 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-23 14:09:09,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:09,953 INFO L93 Difference]: Finished difference Result 359 states and 465 transitions. [2022-11-23 14:09:09,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:09:09,954 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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 21 [2022-11-23 14:09:09,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:09,955 INFO L225 Difference]: With dead ends: 359 [2022-11-23 14:09:09,955 INFO L226 Difference]: Without dead ends: 359 [2022-11-23 14:09:09,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:09:09,956 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 101 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:09,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 438 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-11-23 14:09:09,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 322. [2022-11-23 14:09:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 258 states have (on average 1.5891472868217054) internal successors, (410), 302 states have internal predecessors, (410), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:09:09,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 436 transitions. [2022-11-23 14:09:09,966 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 436 transitions. Word has length 21 [2022-11-23 14:09:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:09,966 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 436 transitions. [2022-11-23 14:09:09,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 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) [2022-11-23 14:09:09,967 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 436 transitions. [2022-11-23 14:09:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 14:09:09,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:09,967 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:09:09,968 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:09,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1240513244, now seen corresponding path program 1 times [2022-11-23 14:09:09,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:09,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781465212] [2022-11-23 14:09:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:09,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:10,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:10,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781465212] [2022-11-23 14:09:10,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781465212] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:10,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:10,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:09:10,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386108057] [2022-11-23 14:09:10,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:10,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:09:10,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:10,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:09:10,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:10,146 INFO L87 Difference]: Start difference. First operand 322 states and 436 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-11-23 14:09:10,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:10,409 INFO L93 Difference]: Finished difference Result 358 states and 463 transitions. [2022-11-23 14:09:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:09:10,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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 21 [2022-11-23 14:09:10,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:10,412 INFO L225 Difference]: With dead ends: 358 [2022-11-23 14:09:10,412 INFO L226 Difference]: Without dead ends: 358 [2022-11-23 14:09:10,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:09:10,413 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 101 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:10,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 356 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:10,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-11-23 14:09:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 322. [2022-11-23 14:09:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 258 states have (on average 1.5813953488372092) internal successors, (408), 302 states have internal predecessors, (408), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:09:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 434 transitions. [2022-11-23 14:09:10,432 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 434 transitions. Word has length 21 [2022-11-23 14:09:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:10,432 INFO L495 AbstractCegarLoop]: Abstraction has 322 states and 434 transitions. [2022-11-23 14:09:10,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 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) [2022-11-23 14:09:10,433 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 434 transitions. [2022-11-23 14:09:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 14:09:10,435 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:10,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:10,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 14:09:10,440 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:10,441 INFO L85 PathProgramCache]: Analyzing trace with hash -198794891, now seen corresponding path program 1 times [2022-11-23 14:09:10,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:10,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019119718] [2022-11-23 14:09:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:10,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:10,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:10,625 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:10,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019119718] [2022-11-23 14:09:10,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019119718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:10,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:10,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:09:10,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864170697] [2022-11-23 14:09:10,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:10,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:09:10,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:10,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:09:10,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:09:10,630 INFO L87 Difference]: Start difference. First operand 322 states and 434 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-23 14:09:10,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:10,936 INFO L93 Difference]: Finished difference Result 402 states and 523 transitions. [2022-11-23 14:09:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:09:10,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2022-11-23 14:09:10,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:10,939 INFO L225 Difference]: With dead ends: 402 [2022-11-23 14:09:10,939 INFO L226 Difference]: Without dead ends: 402 [2022-11-23 14:09:10,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:09:10,940 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 112 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:10,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 306 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-11-23 14:09:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 353. [2022-11-23 14:09:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 286 states have (on average 1.56993006993007) internal successors, (449), 331 states have internal predecessors, (449), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 14:09:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 479 transitions. [2022-11-23 14:09:10,953 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 479 transitions. Word has length 22 [2022-11-23 14:09:10,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:10,953 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 479 transitions. [2022-11-23 14:09:10,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 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) [2022-11-23 14:09:10,954 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 479 transitions. [2022-11-23 14:09:10,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:09:10,955 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:10,955 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:10,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 14:09:10,955 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:10,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:10,956 INFO L85 PathProgramCache]: Analyzing trace with hash 544205615, now seen corresponding path program 1 times [2022-11-23 14:09:10,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:10,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749470694] [2022-11-23 14:09:10,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:10,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:10,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:11,497 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:11,497 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:11,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749470694] [2022-11-23 14:09:11,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749470694] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:11,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615084638] [2022-11-23 14:09:11,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:11,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:11,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:11,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:11,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:09:11,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:11,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 14:09:11,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:12,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:12,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:12,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:09:12,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-11-23 14:09:12,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:12,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:12,256 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:09:12,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 91 [2022-11-23 14:09:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:12,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:13,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615084638] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:13,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365569754] [2022-11-23 14:09:13,170 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-23 14:09:13,171 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:13,175 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:13,180 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:13,181 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:13,600 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-23 14:09:13,602 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:15,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12991#(and (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= 3 |~#list~0.base|) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (or (< 10 ~i~0) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|))) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| 0) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (= |#NULL.base| 0))' at error location [2022-11-23 14:09:15,745 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:15,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:09:15,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2022-11-23 14:09:15,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826213090] [2022-11-23 14:09:15,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:15,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:09:15,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:15,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:09:15,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2022-11-23 14:09:15,747 INFO L87 Difference]: Start difference. First operand 353 states and 479 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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) [2022-11-23 14:09:17,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:17,979 INFO L93 Difference]: Finished difference Result 739 states and 941 transitions. [2022-11-23 14:09:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 14:09:17,982 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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 23 [2022-11-23 14:09:17,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:17,985 INFO L225 Difference]: With dead ends: 739 [2022-11-23 14:09:17,985 INFO L226 Difference]: Without dead ends: 735 [2022-11-23 14:09:17,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=291, Invalid=1431, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 14:09:17,987 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 561 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:17,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1051 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 803 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:09:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-11-23 14:09:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 453. [2022-11-23 14:09:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 374 states have (on average 1.5160427807486632) internal successors, (567), 423 states have internal predecessors, (567), 23 states have call successors, (23), 12 states have call predecessors, (23), 12 states have return successors, (23), 17 states have call predecessors, (23), 23 states have call successors, (23) [2022-11-23 14:09:18,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 613 transitions. [2022-11-23 14:09:18,010 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 613 transitions. Word has length 23 [2022-11-23 14:09:18,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:18,011 INFO L495 AbstractCegarLoop]: Abstraction has 453 states and 613 transitions. [2022-11-23 14:09:18,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 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) [2022-11-23 14:09:18,011 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 613 transitions. [2022-11-23 14:09:18,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-23 14:09:18,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:18,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:18,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:18,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:18,218 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:18,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2063322473, now seen corresponding path program 1 times [2022-11-23 14:09:18,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:18,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902663451] [2022-11-23 14:09:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:18,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:18,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:18,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:18,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902663451] [2022-11-23 14:09:18,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902663451] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:18,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:18,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 14:09:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600420042] [2022-11-23 14:09:18,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:18,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:09:18,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:09:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:09:18,441 INFO L87 Difference]: Start difference. First operand 453 states and 613 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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) [2022-11-23 14:09:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:19,142 INFO L93 Difference]: Finished difference Result 799 states and 1055 transitions. [2022-11-23 14:09:19,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:09:19,143 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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 24 [2022-11-23 14:09:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:19,146 INFO L225 Difference]: With dead ends: 799 [2022-11-23 14:09:19,147 INFO L226 Difference]: Without dead ends: 799 [2022-11-23 14:09:19,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:09:19,148 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 262 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:19,148 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 443 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:09:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2022-11-23 14:09:19,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 499. [2022-11-23 14:09:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 414 states have (on average 1.4951690821256038) internal successors, (619), 465 states have internal predecessors, (619), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 14:09:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 673 transitions. [2022-11-23 14:09:19,192 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 673 transitions. Word has length 24 [2022-11-23 14:09:19,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:19,192 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 673 transitions. [2022-11-23 14:09:19,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 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) [2022-11-23 14:09:19,193 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 673 transitions. [2022-11-23 14:09:19,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:09:19,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:19,193 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:09:19,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-23 14:09:19,194 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:19,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash 461512992, now seen corresponding path program 1 times [2022-11-23 14:09:19,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:19,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786710388] [2022-11-23 14:09:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:19,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:19,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:19,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786710388] [2022-11-23 14:09:19,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786710388] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:19,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:19,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:09:19,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442679537] [2022-11-23 14:09:19,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:19,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:09:19,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:19,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:09:19,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:09:19,466 INFO L87 Difference]: Start difference. First operand 499 states and 673 transitions. Second operand has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 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) [2022-11-23 14:09:19,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:19,915 INFO L93 Difference]: Finished difference Result 629 states and 792 transitions. [2022-11-23 14:09:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:09:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 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 25 [2022-11-23 14:09:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:19,918 INFO L225 Difference]: With dead ends: 629 [2022-11-23 14:09:19,918 INFO L226 Difference]: Without dead ends: 629 [2022-11-23 14:09:19,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:09:19,919 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 394 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:19,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 373 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-23 14:09:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 499. [2022-11-23 14:09:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 414 states have (on average 1.4758454106280192) internal successors, (611), 465 states have internal predecessors, (611), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 14:09:19,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 665 transitions. [2022-11-23 14:09:19,944 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 665 transitions. Word has length 25 [2022-11-23 14:09:19,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:19,944 INFO L495 AbstractCegarLoop]: Abstraction has 499 states and 665 transitions. [2022-11-23 14:09:19,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 7 states have internal predecessors, (23), 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) [2022-11-23 14:09:19,945 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 665 transitions. [2022-11-23 14:09:19,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 14:09:19,946 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:19,946 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] [2022-11-23 14:09:19,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-23 14:09:19,946 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:19,947 INFO L85 PathProgramCache]: Analyzing trace with hash 136633119, now seen corresponding path program 1 times [2022-11-23 14:09:19,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:19,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076882126] [2022-11-23 14:09:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:19,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:19,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:20,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:20,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:20,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076882126] [2022-11-23 14:09:20,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076882126] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:20,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250104549] [2022-11-23 14:09:20,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:20,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:20,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:20,264 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:20,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:09:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:20,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 14:09:20,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:20,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:20,826 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:09:20,827 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 30 treesize of output 34 [2022-11-23 14:09:21,095 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:21,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250104549] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:21,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [812081100] [2022-11-23 14:09:21,100 INFO L159 IcfgInterpreter]: Started Sifa with 23 locations of interest [2022-11-23 14:09:21,100 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:21,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:21,102 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:21,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:21,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:21,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,341 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 14:09:21,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:09:21,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:21,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:09:21,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:21,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:09:21,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:09:21,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:09:21,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:09:21,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:09:21,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 58 [2022-11-23 14:09:21,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 14:09:21,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:21,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 58 [2022-11-23 14:09:22,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:09:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:09:22,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:09:22,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:09:22,645 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:22,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:09:22,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:09:22,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:09:22,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:09:22,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:09:22,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:09:22,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:22,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 14:09:23,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:09:23,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:09:23,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:09:23,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:23,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:23,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 14:09:23,546 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 56 for LOIs [2022-11-23 14:09:23,551 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [812081100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:29,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:29,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [7, 7, 8] total 38 [2022-11-23 14:09:29,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733920482] [2022-11-23 14:09:29,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:29,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 14:09:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:29,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 14:09:29,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:09:29,904 INFO L87 Difference]: Start difference. First operand 499 states and 665 transitions. Second operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 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) [2022-11-23 14:09:31,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:31,597 INFO L93 Difference]: Finished difference Result 538 states and 707 transitions. [2022-11-23 14:09:31,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 14:09:31,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 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 29 [2022-11-23 14:09:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:31,600 INFO L225 Difference]: With dead ends: 538 [2022-11-23 14:09:31,600 INFO L226 Difference]: Without dead ends: 538 [2022-11-23 14:09:31,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=364, Invalid=1042, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:09:31,601 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 50 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:31,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 234 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-11-23 14:09:31,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-11-23 14:09:31,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 512. [2022-11-23 14:09:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 427 states have (on average 1.4613583138173303) internal successors, (624), 477 states have internal predecessors, (624), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 20 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 14:09:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 678 transitions. [2022-11-23 14:09:31,625 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 678 transitions. Word has length 29 [2022-11-23 14:09:31,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:31,626 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 678 transitions. [2022-11-23 14:09:31,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 15 states have internal predecessors, (21), 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) [2022-11-23 14:09:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 678 transitions. [2022-11-23 14:09:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:09:31,629 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:31,629 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] [2022-11-23 14:09:31,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:31,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-23 14:09:31,836 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:31,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:31,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1938966803, now seen corresponding path program 1 times [2022-11-23 14:09:31,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:31,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841944070] [2022-11-23 14:09:31,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:31,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:32,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:32,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841944070] [2022-11-23 14:09:32,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841944070] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:32,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645589618] [2022-11-23 14:09:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:32,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:32,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:32,200 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:32,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:09:32,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:32,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 14:09:32,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:32,637 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:32,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:32,786 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:09:32,787 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 30 treesize of output 34 [2022-11-23 14:09:32,969 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:09:32,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645589618] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:32,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491850019] [2022-11-23 14:09:32,976 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2022-11-23 14:09:32,976 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:32,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:32,976 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:32,977 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:33,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:33,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 14:09:33,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:33,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:09:33,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:09:33,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:33,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:09:33,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:09:33,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:09:33,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:09:33,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,527 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 14:09:33,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:09:33,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:09:33,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:09:33,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:09:33,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:33,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:09:34,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:09:34,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:34,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:34,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-23 14:09:34,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:34,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:34,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-23 14:09:34,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:34,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:34,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-23 14:09:34,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:34,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:34,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:09:34,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-23 14:09:34,727 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:09:34,727 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 17 treesize of output 21 [2022-11-23 14:09:34,743 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 17 treesize of output 19 [2022-11-23 14:09:34,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:09:34,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:09:34,862 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 23 treesize of output 1 [2022-11-23 14:09:34,899 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:09:34,900 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 34 [2022-11-23 14:09:34,914 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 23 treesize of output 1 [2022-11-23 14:09:34,943 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:09:34,943 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 34 [2022-11-23 14:09:35,034 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:09:35,035 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 50 treesize of output 61 [2022-11-23 14:09:35,065 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 13 treesize of output 9 [2022-11-23 14:09:35,125 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:09:35,125 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 50 treesize of output 61 [2022-11-23 14:09:35,303 INFO L321 Elim1Store]: treesize reduction 56, result has 54.5 percent of original size [2022-11-23 14:09:35,304 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 79 treesize of output 117 [2022-11-23 14:09:35,487 INFO L321 Elim1Store]: treesize reduction 56, result has 54.5 percent of original size [2022-11-23 14:09:35,488 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 79 treesize of output 117 [2022-11-23 14:09:35,646 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:09:35,646 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 33 treesize of output 27 [2022-11-23 14:09:43,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:09:43,270 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 23 treesize of output 1 [2022-11-23 14:09:43,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:09:47,032 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:09:47,032 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:09:47,069 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:09:47,070 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 17 treesize of output 21 [2022-11-23 14:09:47,159 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 23 treesize of output 1 [2022-11-23 14:09:47,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:09:47,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:09:47,201 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 23 treesize of output 1 [2022-11-23 14:09:47,227 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:09:47,227 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 34 [2022-11-23 14:09:47,257 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:09:47,257 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 34 [2022-11-23 14:09:47,340 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:09:47,341 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 50 treesize of output 61 [2022-11-23 14:09:47,413 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:09:47,413 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 50 treesize of output 61 [2022-11-23 14:09:47,443 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 13 treesize of output 9 [2022-11-23 14:09:47,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:09:47,639 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 23 treesize of output 1 [2022-11-23 14:09:47,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:09:48,076 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 23 treesize of output 1 [2022-11-23 14:09:48,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:48,200 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:09:48,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:09:48,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:09:48,257 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:09:48,258 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:09:48,637 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:09:48,638 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:09:48,671 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:09:48,671 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 17 treesize of output 21 [2022-11-23 14:09:48,749 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2022-11-23 14:09:48,757 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:09:55,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18131#(and (<= |~#list~0.base| 3) (= |~#list~0.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |#NULL.base|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (or (not (<= (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset| 4) (select |#length| |ULTIMATE.start_append_one_~list#1.base|))) (not (<= 0 (+ (* 4 |ULTIMATE.start_append_one_~to#1|) |ULTIMATE.start_append_one_~list#1.offset|)))) (<= |ULTIMATE.start_main_~y~0#1| 5) (<= |ULTIMATE.start_main_#t~ret22#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_append_one_~list#1.offset| |ULTIMATE.start_append_one_#in~list#1.offset|) (= |ULTIMATE.start_append_one_#in~list#1.base| |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_append_one_~to#1|) (<= 0 (+ |ULTIMATE.start_main_#t~ret22#1| 2147483648)) (<= |#NULL.base| 0) (= |ULTIMATE.start_append_one_#in~list#1.base| |~#list~0.base|) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (= |ULTIMATE.start_append_one_#in~to#1| |ULTIMATE.start_main_#t~ret22#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2022-11-23 14:09:55,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:09:55,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:09:55,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 22 [2022-11-23 14:09:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055924619] [2022-11-23 14:09:55,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:09:55,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 14:09:55,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:55,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 14:09:55,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1664, Unknown=0, NotChecked=0, Total=2070 [2022-11-23 14:09:55,737 INFO L87 Difference]: Start difference. First operand 512 states and 678 transitions. Second operand has 23 states, 19 states have (on average 4.052631578947368) internal successors, (77), 20 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:09:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:56,228 INFO L93 Difference]: Finished difference Result 533 states and 675 transitions. [2022-11-23 14:09:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:09:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.052631578947368) internal successors, (77), 20 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 30 [2022-11-23 14:09:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:56,230 INFO L225 Difference]: With dead ends: 533 [2022-11-23 14:09:56,231 INFO L226 Difference]: Without dead ends: 533 [2022-11-23 14:09:56,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=444, Invalid=1812, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:09:56,232 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 945 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:56,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 646 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 14:09:56,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-11-23 14:09:56,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 498. [2022-11-23 14:09:56,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 415 states have (on average 1.453012048192771) internal successors, (603), 464 states have internal predecessors, (603), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 14:09:56,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 657 transitions. [2022-11-23 14:09:56,251 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 657 transitions. Word has length 30 [2022-11-23 14:09:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:56,252 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 657 transitions. [2022-11-23 14:09:56,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.052631578947368) internal successors, (77), 20 states have internal predecessors, (77), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:09:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 657 transitions. [2022-11-23 14:09:56,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 14:09:56,253 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:56,253 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:09:56,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:09:56,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:56,463 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:56,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:56,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1085149533, now seen corresponding path program 1 times [2022-11-23 14:09:56,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:56,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040208133] [2022-11-23 14:09:56,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:56,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:56,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:09:56,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:56,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040208133] [2022-11-23 14:09:56,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040208133] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:56,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:56,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:09:56,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47886470] [2022-11-23 14:09:56,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:56,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:09:56,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:56,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:09:56,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:09:56,731 INFO L87 Difference]: Start difference. First operand 498 states and 657 transitions. Second operand has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:09:57,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:57,031 INFO L93 Difference]: Finished difference Result 599 states and 759 transitions. [2022-11-23 14:09:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:09:57,032 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-11-23 14:09:57,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:57,034 INFO L225 Difference]: With dead ends: 599 [2022-11-23 14:09:57,034 INFO L226 Difference]: Without dead ends: 599 [2022-11-23 14:09:57,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:09:57,035 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 359 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:57,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 189 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:09:57,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2022-11-23 14:09:57,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 496. [2022-11-23 14:09:57,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 415 states have (on average 1.4433734939759035) internal successors, (599), 462 states have internal predecessors, (599), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 14:09:57,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 653 transitions. [2022-11-23 14:09:57,050 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 653 transitions. Word has length 32 [2022-11-23 14:09:57,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:57,050 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 653 transitions. [2022-11-23 14:09:57,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.5) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:09:57,051 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 653 transitions. [2022-11-23 14:09:57,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-23 14:09:57,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:57,051 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:09:57,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-23 14:09:57,052 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1184501238, now seen corresponding path program 1 times [2022-11-23 14:09:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370826980] [2022-11-23 14:09:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:57,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:57,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:57,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370826980] [2022-11-23 14:09:57,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370826980] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:09:57,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:09:57,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:09:57,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399471912] [2022-11-23 14:09:57,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:09:57,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:09:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:09:57,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:09:57,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:09:57,423 INFO L87 Difference]: Start difference. First operand 496 states and 653 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 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) [2022-11-23 14:09:57,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:09:57,657 INFO L93 Difference]: Finished difference Result 519 states and 653 transitions. [2022-11-23 14:09:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:09:57,658 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 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 32 [2022-11-23 14:09:57,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:09:57,660 INFO L225 Difference]: With dead ends: 519 [2022-11-23 14:09:57,660 INFO L226 Difference]: Without dead ends: 519 [2022-11-23 14:09:57,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:09:57,660 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 422 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:09:57,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 237 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:09:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2022-11-23 14:09:57,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 495. [2022-11-23 14:09:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 415 states have (on average 1.4385542168674699) internal successors, (597), 461 states have internal predecessors, (597), 27 states have call successors, (27), 14 states have call predecessors, (27), 14 states have return successors, (27), 19 states have call predecessors, (27), 27 states have call successors, (27) [2022-11-23 14:09:57,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 651 transitions. [2022-11-23 14:09:57,674 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 651 transitions. Word has length 32 [2022-11-23 14:09:57,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:09:57,675 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 651 transitions. [2022-11-23 14:09:57,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 8 states have internal predecessors, (30), 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) [2022-11-23 14:09:57,676 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 651 transitions. [2022-11-23 14:09:57,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:09:57,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:09:57,676 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] [2022-11-23 14:09:57,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-23 14:09:57,677 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:09:57,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:09:57,677 INFO L85 PathProgramCache]: Analyzing trace with hash -9535657, now seen corresponding path program 1 times [2022-11-23 14:09:57,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:09:57,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917969939] [2022-11-23 14:09:57,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:57,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:09:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:09:57,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:09:57,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917969939] [2022-11-23 14:09:57,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917969939] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:09:57,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125122682] [2022-11-23 14:09:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:09:57,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:09:57,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:09:57,819 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:09:57,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:09:57,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:09:57,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:09:57,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:09:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:09:58,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:09:58,139 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-23 14:09:58,139 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 12 treesize of output 11 [2022-11-23 14:09:58,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:09:58,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125122682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:09:58,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1991567027] [2022-11-23 14:09:58,169 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-23 14:09:58,170 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:09:58,170 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:09:58,170 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:09:58,170 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:09:58,852 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 56 for LOIs [2022-11-23 14:09:58,857 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:10:01,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1991567027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:01,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:10:01,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 23 [2022-11-23 14:10:01,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635773923] [2022-11-23 14:10:01,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:01,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:10:01,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:01,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:10:01,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:10:01,331 INFO L87 Difference]: Start difference. First operand 495 states and 651 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 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) [2022-11-23 14:10:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:02,838 INFO L93 Difference]: Finished difference Result 513 states and 671 transitions. [2022-11-23 14:10:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:10:02,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 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 34 [2022-11-23 14:10:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:02,840 INFO L225 Difference]: With dead ends: 513 [2022-11-23 14:10:02,840 INFO L226 Difference]: Without dead ends: 513 [2022-11-23 14:10:02,841 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:10:02,841 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 38 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:02,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 284 Invalid, 906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 14:10:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-11-23 14:10:02,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 504. [2022-11-23 14:10:02,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 423 states have (on average 1.4326241134751774) internal successors, (606), 469 states have internal predecessors, (606), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 20 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-23 14:10:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 662 transitions. [2022-11-23 14:10:02,868 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 662 transitions. Word has length 34 [2022-11-23 14:10:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:02,869 INFO L495 AbstractCegarLoop]: Abstraction has 504 states and 662 transitions. [2022-11-23 14:10:02,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 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) [2022-11-23 14:10:02,869 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 662 transitions. [2022-11-23 14:10:02,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:10:02,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:02,872 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:10:02,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:03,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 14:10:03,078 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:10:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:03,078 INFO L85 PathProgramCache]: Analyzing trace with hash -139305668, now seen corresponding path program 1 times [2022-11-23 14:10:03,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:03,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171772166] [2022-11-23 14:10:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:03,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:03,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:03,160 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:03,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171772166] [2022-11-23 14:10:03,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171772166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:03,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180367995] [2022-11-23 14:10:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:03,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:03,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:03,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:03,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:10:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:03,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:10:03,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:03,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:03,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:03,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180367995] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:03,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:10:03,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-23 14:10:03,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169618876] [2022-11-23 14:10:03,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:03,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:10:03,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:03,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:10:03,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:03,346 INFO L87 Difference]: Start difference. First operand 504 states and 662 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-11-23 14:10:03,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:03,419 INFO L93 Difference]: Finished difference Result 639 states and 830 transitions. [2022-11-23 14:10:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:10:03,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 34 [2022-11-23 14:10:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:03,422 INFO L225 Difference]: With dead ends: 639 [2022-11-23 14:10:03,422 INFO L226 Difference]: Without dead ends: 639 [2022-11-23 14:10:03,422 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:10:03,423 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 175 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:03,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 253 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:10:03,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-11-23 14:10:03,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 523. [2022-11-23 14:10:03,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 442 states have (on average 1.4298642533936652) internal successors, (632), 488 states have internal predecessors, (632), 28 states have call successors, (28), 14 states have call predecessors, (28), 14 states have return successors, (28), 20 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-23 14:10:03,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 688 transitions. [2022-11-23 14:10:03,438 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 688 transitions. Word has length 34 [2022-11-23 14:10:03,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:03,438 INFO L495 AbstractCegarLoop]: Abstraction has 523 states and 688 transitions. [2022-11-23 14:10:03,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-11-23 14:10:03,438 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 688 transitions. [2022-11-23 14:10:03,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:10:03,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:03,439 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:10:03,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:03,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:03,646 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:10:03,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:03,646 INFO L85 PathProgramCache]: Analyzing trace with hash -139306953, now seen corresponding path program 1 times [2022-11-23 14:10:03,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:03,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951305066] [2022-11-23 14:10:03,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:03,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:04,642 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:04,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951305066] [2022-11-23 14:10:04,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951305066] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:04,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:04,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-23 14:10:04,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393468779] [2022-11-23 14:10:04,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:04,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:10:04,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:04,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:10:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:10:04,644 INFO L87 Difference]: Start difference. First operand 523 states and 688 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-11-23 14:10:05,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:05,817 INFO L93 Difference]: Finished difference Result 740 states and 920 transitions. [2022-11-23 14:10:05,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:10:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 34 [2022-11-23 14:10:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:05,821 INFO L225 Difference]: With dead ends: 740 [2022-11-23 14:10:05,822 INFO L226 Difference]: Without dead ends: 740 [2022-11-23 14:10:05,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:10:05,823 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 976 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 980 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:05,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [980 Valid, 750 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:10:05,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-11-23 14:10:05,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 585. [2022-11-23 14:10:05,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 499 states have (on average 1.4228456913827656) internal successors, (710), 546 states have internal predecessors, (710), 32 states have call successors, (32), 16 states have call predecessors, (32), 16 states have return successors, (32), 22 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-23 14:10:05,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 774 transitions. [2022-11-23 14:10:05,839 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 774 transitions. Word has length 34 [2022-11-23 14:10:05,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:05,840 INFO L495 AbstractCegarLoop]: Abstraction has 585 states and 774 transitions. [2022-11-23 14:10:05,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2022-11-23 14:10:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 774 transitions. [2022-11-23 14:10:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:10:05,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:05,841 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-23 14:10:05,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-23 14:10:05,841 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:10:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:05,842 INFO L85 PathProgramCache]: Analyzing trace with hash -139306952, now seen corresponding path program 1 times [2022-11-23 14:10:05,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:05,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187817361] [2022-11-23 14:10:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:05,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:08,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:08,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:08,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187817361] [2022-11-23 14:10:08,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187817361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:08,137 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:10:08,137 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-11-23 14:10:08,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306197379] [2022-11-23 14:10:08,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:08,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:10:08,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:08,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:10:08,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:10:08,139 INFO L87 Difference]: Start difference. First operand 585 states and 774 transitions. Second operand has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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) [2022-11-23 14:10:10,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:10,832 INFO L93 Difference]: Finished difference Result 908 states and 1154 transitions. [2022-11-23 14:10:10,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:10:10,833 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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 34 [2022-11-23 14:10:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:10,836 INFO L225 Difference]: With dead ends: 908 [2022-11-23 14:10:10,837 INFO L226 Difference]: Without dead ends: 908 [2022-11-23 14:10:10,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=317, Invalid=943, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 14:10:10,838 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 1144 mSDsluCounter, 810 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:10,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 914 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:10:10,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-11-23 14:10:10,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 787. [2022-11-23 14:10:10,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 787 states, 689 states have (on average 1.4600870827285921) internal successors, (1006), 737 states have internal predecessors, (1006), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (40), 29 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-23 14:10:10,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 787 states to 787 states and 1086 transitions. [2022-11-23 14:10:10,860 INFO L78 Accepts]: Start accepts. Automaton has 787 states and 1086 transitions. Word has length 34 [2022-11-23 14:10:10,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:10,860 INFO L495 AbstractCegarLoop]: Abstraction has 787 states and 1086 transitions. [2022-11-23 14:10:10,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 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) [2022-11-23 14:10:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 787 states and 1086 transitions. [2022-11-23 14:10:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:10:10,861 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:10,862 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:10,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-23 14:10:10,862 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:10:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:10,862 INFO L85 PathProgramCache]: Analyzing trace with hash 533639021, now seen corresponding path program 1 times [2022-11-23 14:10:10,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:10,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676844314] [2022-11-23 14:10:10,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:10,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:11,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:11,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676844314] [2022-11-23 14:10:11,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676844314] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:11,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104040572] [2022-11-23 14:10:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:11,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:11,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:11,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:11,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:10:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:11,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:10:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:10:11,394 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:10:11,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104040572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:10:11,394 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:10:11,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2022-11-23 14:10:11,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424425346] [2022-11-23 14:10:11,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:10:11,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:10:11,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:10:11,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:10:11,396 INFO L87 Difference]: Start difference. First operand 787 states and 1086 transitions. Second operand has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:11,477 INFO L93 Difference]: Finished difference Result 912 states and 1243 transitions. [2022-11-23 14:10:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:10:11,478 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2022-11-23 14:10:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:11,480 INFO L225 Difference]: With dead ends: 912 [2022-11-23 14:10:11,481 INFO L226 Difference]: Without dead ends: 912 [2022-11-23 14:10:11,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:10:11,481 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 290 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:11,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 164 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:10:11,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-11-23 14:10:11,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 786. [2022-11-23 14:10:11,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 786 states, 689 states have (on average 1.4528301886792452) internal successors, (1001), 736 states have internal predecessors, (1001), 40 states have call successors, (40), 20 states have call predecessors, (40), 20 states have return successors, (40), 29 states have call predecessors, (40), 40 states have call successors, (40) [2022-11-23 14:10:11,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1081 transitions. [2022-11-23 14:10:11,506 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1081 transitions. Word has length 35 [2022-11-23 14:10:11,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:11,506 INFO L495 AbstractCegarLoop]: Abstraction has 786 states and 1081 transitions. [2022-11-23 14:10:11,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:10:11,507 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1081 transitions. [2022-11-23 14:10:11,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 14:10:11,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:11,508 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:11,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:11,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:11,713 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:10:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -637059353, now seen corresponding path program 1 times [2022-11-23 14:10:11,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:11,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53733417] [2022-11-23 14:10:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:11,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:13,765 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:13,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53733417] [2022-11-23 14:10:13,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53733417] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:13,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852592805] [2022-11-23 14:10:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:13,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:13,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:13,766 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:13,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:10:13,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:13,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 14:10:13,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:14,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:14,357 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 35 treesize of output 34 [2022-11-23 14:10:14,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:14,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-23 14:10:14,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:14,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:14,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:14,691 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:10:14,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 130 [2022-11-23 14:10:14,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:14,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:14,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:10:14,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 66 [2022-11-23 14:10:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:14,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:16,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:16,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:16,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:10:16,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 247 treesize of output 243 [2022-11-23 14:10:16,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:16,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:16,290 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:10:16,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 207 treesize of output 191 [2022-11-23 14:10:17,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:10:17,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852592805] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:10:17,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1440458423] [2022-11-23 14:10:17,015 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-23 14:10:17,015 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:10:17,015 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:10:17,016 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:10:17,016 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:10:17,151 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:17,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 14:10:17,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:10:17,297 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:17,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:10:17,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:10:17,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:10:17,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:10:17,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:10:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:10:17,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 14:10:17,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:10:17,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:10:17,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:10:17,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 58 [2022-11-23 14:10:17,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:17,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:17,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-23 14:10:17,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:17,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:17,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:17,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-23 14:10:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:18,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:18,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:10:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:18,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:18,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:18,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:18,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:18,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-23 14:10:18,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:18,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:18,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:18,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:18,353 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:18,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-23 14:10:18,471 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:10:18,471 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:10:18,501 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:10:18,501 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 17 treesize of output 21 [2022-11-23 14:10:18,602 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 27 treesize of output 26 [2022-11-23 14:10:18,622 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 27 treesize of output 26 [2022-11-23 14:10:18,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:10:18,682 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:10:18,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-23 14:10:18,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:10:18,732 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:10:18,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-23 14:10:18,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:10:18,847 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:10:18,847 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 61 treesize of output 75 [2022-11-23 14:10:18,922 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:10:18,923 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 61 treesize of output 75 [2022-11-23 14:10:19,769 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 23 treesize of output 1 [2022-11-23 14:10:19,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:19,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:20,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:10:20,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:10:20,113 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 23 treesize of output 1 [2022-11-23 14:10:20,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:20,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-23 14:10:20,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:20,387 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:10:20,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 21 [2022-11-23 14:10:20,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:20,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:10:20,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,533 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 27 treesize of output 26 [2022-11-23 14:10:20,545 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 23 treesize of output 1 [2022-11-23 14:10:20,587 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 23 treesize of output 1 [2022-11-23 14:10:20,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:20,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2022-11-23 14:10:20,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:20,648 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 14:10:20,648 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-23 14:10:20,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:20,715 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 14:10:20,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 47 [2022-11-23 14:10:20,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:20,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2022-11-23 14:10:20,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:10:20,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:20,975 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:10:20,975 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 53 treesize of output 54 [2022-11-23 14:10:20,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:20,999 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 33 treesize of output 13 [2022-11-23 14:10:21,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:21,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:21,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:21,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:21,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 60 [2022-11-23 14:10:21,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:10:21,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:10:21,215 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 23 treesize of output 1 [2022-11-23 14:10:21,876 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:10:21,877 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 17 treesize of output 21 [2022-11-23 14:10:21,889 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 17 treesize of output 19 [2022-11-23 14:10:21,986 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 27 treesize of output 26 [2022-11-23 14:10:21,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:10:22,017 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 27 treesize of output 26 [2022-11-23 14:10:22,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:10:22,088 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:10:22,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-23 14:10:22,132 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:10:22,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-23 14:10:22,210 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 13 treesize of output 9 [2022-11-23 14:10:22,218 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 19 treesize of output 1 [2022-11-23 14:10:22,227 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 19 treesize of output 1 [2022-11-23 14:10:22,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:22,316 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:10:22,316 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 33 treesize of output 27 [2022-11-23 14:10:22,334 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:22,494 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 20 for LOIs [2022-11-23 14:10:22,496 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:10:30,824 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29011#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (<= |#NULL.base| 0) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 |~#list~0.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |~#list~0.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|)) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2022-11-23 14:10:30,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:10:30,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:10:30,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 39 [2022-11-23 14:10:30,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460233512] [2022-11-23 14:10:30,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:10:30,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 14:10:30,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:10:30,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 14:10:30,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=4040, Unknown=0, NotChecked=0, Total=4422 [2022-11-23 14:10:30,827 INFO L87 Difference]: Start difference. First operand 786 states and 1081 transitions. Second operand has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:10:49,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:10:49,565 INFO L93 Difference]: Finished difference Result 2702 states and 3563 transitions. [2022-11-23 14:10:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-23 14:10:49,566 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-11-23 14:10:49,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:10:49,575 INFO L225 Difference]: With dead ends: 2702 [2022-11-23 14:10:49,575 INFO L226 Difference]: Without dead ends: 2695 [2022-11-23 14:10:49,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5940 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=2107, Invalid=16525, Unknown=0, NotChecked=0, Total=18632 [2022-11-23 14:10:49,580 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 4262 mSDsluCounter, 4976 mSDsCounter, 0 mSdLazyCounter, 5281 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4263 SdHoareTripleChecker+Valid, 5153 SdHoareTripleChecker+Invalid, 5620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 5281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:10:49,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4263 Valid, 5153 Invalid, 5620 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [339 Valid, 5281 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-11-23 14:10:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2022-11-23 14:10:49,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 1496. [2022-11-23 14:10:49,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1343 states have (on average 1.5271779597915116) internal successors, (2051), 1396 states have internal predecessors, (2051), 75 states have call successors, (75), 41 states have call predecessors, (75), 41 states have return successors, (75), 58 states have call predecessors, (75), 75 states have call successors, (75) [2022-11-23 14:10:49,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 2201 transitions. [2022-11-23 14:10:49,631 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 2201 transitions. Word has length 36 [2022-11-23 14:10:49,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:10:49,631 INFO L495 AbstractCegarLoop]: Abstraction has 1496 states and 2201 transitions. [2022-11-23 14:10:49,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 39 states have internal predecessors, (90), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:10:49,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 2201 transitions. [2022-11-23 14:10:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 14:10:49,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:10:49,633 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:10:49,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:10:49,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:49,839 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:10:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:10:49,839 INFO L85 PathProgramCache]: Analyzing trace with hash -93290116, now seen corresponding path program 1 times [2022-11-23 14:10:49,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:10:49,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080815995] [2022-11-23 14:10:49,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:49,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:10:49,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:51,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:10:51,573 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:10:51,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080815995] [2022-11-23 14:10:51,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080815995] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:51,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232934700] [2022-11-23 14:10:51,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:10:51,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:10:51,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:10:51,574 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:10:51,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:10:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:10:51,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-23 14:10:51,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:10:51,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:10:52,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:52,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 14:10:52,357 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-11-23 14:10:52,357 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 23 treesize of output 33 [2022-11-23 14:10:52,360 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 21 treesize of output 9 [2022-11-23 14:10:52,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:10:52,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:10:52,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232934700] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:10:52,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1656381393] [2022-11-23 14:10:52,525 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-23 14:10:52,525 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:10:52,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:10:52,525 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:10:52,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:10:52,648 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 14:10:52,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:52,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:10:52,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:52,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:10:52,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:10:52,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:10:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:10:52,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:52,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:10:53,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:10:53,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 14:10:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:10:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 58 [2022-11-23 14:10:53,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:10:53,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:10:53,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:53,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:53,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-23 14:10:53,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:53,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:53,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-23 14:10:53,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:10:53,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:53,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:53,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-23 14:10:53,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:53,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:10:53,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-23 14:10:53,826 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:10:53,826 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:10:53,856 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:10:53,856 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 17 treesize of output 21 [2022-11-23 14:10:53,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:53,942 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 23 treesize of output 1 [2022-11-23 14:10:53,951 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:53,978 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 23 treesize of output 1 [2022-11-23 14:10:54,000 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:10:54,001 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 34 [2022-11-23 14:10:54,029 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:10:54,030 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 34 [2022-11-23 14:10:54,091 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:10:54,091 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 50 treesize of output 61 [2022-11-23 14:10:54,148 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:10:54,149 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 50 treesize of output 61 [2022-11-23 14:10:54,174 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 13 treesize of output 9 [2022-11-23 14:10:54,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:54,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:54,423 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 23 treesize of output 1 [2022-11-23 14:10:54,824 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 23 treesize of output 1 [2022-11-23 14:10:54,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:54,858 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:10:54,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:10:54,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:54,899 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:10:54,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:10:55,978 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:10:55,979 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 17 treesize of output 21 [2022-11-23 14:10:55,991 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 17 treesize of output 19 [2022-11-23 14:10:56,060 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 23 treesize of output 1 [2022-11-23 14:10:56,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:56,078 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:56,101 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 23 treesize of output 1 [2022-11-23 14:10:56,124 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:10:56,125 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 34 [2022-11-23 14:10:56,163 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:10:56,163 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 34 [2022-11-23 14:10:56,226 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:10:56,227 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 50 treesize of output 61 [2022-11-23 14:10:56,246 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 13 treesize of output 9 [2022-11-23 14:10:56,298 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:10:56,298 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 50 treesize of output 61 [2022-11-23 14:10:56,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:56,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:10:56,972 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 23 treesize of output 1 [2022-11-23 14:10:57,290 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 23 treesize of output 1 [2022-11-23 14:10:57,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:57,335 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:10:57,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:10:57,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:10:57,367 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:10:57,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:10:57,793 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:10:57,793 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:10:57,827 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:10:57,828 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 17 treesize of output 21 [2022-11-23 14:10:57,898 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2022-11-23 14:10:57,905 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:11:05,739 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33544#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= ~i~0 0) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (<= |ULTIMATE.start_main_#t~ret22#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~head~0#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_#t~ret22#1| 2147483648)) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-23 14:11:05,740 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:11:05,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:11:05,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 29 [2022-11-23 14:11:05,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116644419] [2022-11-23 14:11:05,740 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:05,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 14:11:05,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 14:11:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2797, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 14:11:05,743 INFO L87 Difference]: Start difference. First operand 1496 states and 2201 transitions. Second operand has 30 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:11:08,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:08,810 INFO L93 Difference]: Finished difference Result 2421 states and 3557 transitions. [2022-11-23 14:11:08,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 14:11:08,810 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-23 14:11:08,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:08,816 INFO L225 Difference]: With dead ends: 2421 [2022-11-23 14:11:08,816 INFO L226 Difference]: Without dead ends: 2421 [2022-11-23 14:11:08,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1764 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=705, Invalid=5457, Unknown=0, NotChecked=0, Total=6162 [2022-11-23 14:11:08,818 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 1339 mSDsluCounter, 1503 mSDsCounter, 0 mSdLazyCounter, 2419 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1344 SdHoareTripleChecker+Valid, 1666 SdHoareTripleChecker+Invalid, 2579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 2419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:08,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1344 Valid, 1666 Invalid, 2579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 2419 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 14:11:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2022-11-23 14:11:08,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 1628. [2022-11-23 14:11:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1458 states have (on average 1.5164609053497942) internal successors, (2211), 1511 states have internal predecessors, (2211), 86 states have call successors, (86), 47 states have call predecessors, (86), 47 states have return successors, (86), 69 states have call predecessors, (86), 86 states have call successors, (86) [2022-11-23 14:11:08,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 2383 transitions. [2022-11-23 14:11:08,879 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 2383 transitions. Word has length 36 [2022-11-23 14:11:08,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:08,879 INFO L495 AbstractCegarLoop]: Abstraction has 1628 states and 2383 transitions. [2022-11-23 14:11:08,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 2.3076923076923075) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:11:08,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 2383 transitions. [2022-11-23 14:11:08,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 14:11:08,880 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:08,881 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:08,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:09,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-23 14:11:09,087 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:11:09,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:09,087 INFO L85 PathProgramCache]: Analyzing trace with hash -93290115, now seen corresponding path program 1 times [2022-11-23 14:11:09,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156894155] [2022-11-23 14:11:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:09,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:11,384 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:11:11,385 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:11,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156894155] [2022-11-23 14:11:11,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156894155] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:11,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185717875] [2022-11-23 14:11:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:11,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:11,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:11,388 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:11,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:11:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:11,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 14:11:11,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:11,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:11:11,723 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:11:12,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:12,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:12,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:12,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-23 14:11:12,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:12,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 33 [2022-11-23 14:11:12,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:12,439 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 18 treesize of output 20 [2022-11-23 14:11:12,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 14 [2022-11-23 14:11:12,451 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 14:11:12,451 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 [2022-11-23 14:11:12,457 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 19 treesize of output 7 [2022-11-23 14:11:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:12,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:19,240 WARN L233 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:29,557 WARN L233 SmtUtils]: Spent 10.15s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:11:29,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185717875] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:29,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1787540871] [2022-11-23 14:11:29,695 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-23 14:11:29,695 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:11:29,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:11:29,695 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:11:29,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:11:29,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:29,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,819 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 14:11:29,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:29,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:11:29,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:11:29,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:11:30,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:11:30,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:11:30,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:11:30,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 14:11:30,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:11:30,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:11:30,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:11:30,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:11:30,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:11:30,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:11:30,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:30,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:30,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-23 14:11:30,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:30,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:30,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2022-11-23 14:11:30,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:30,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:30,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-23 14:11:30,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:30,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:30,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-23 14:11:31,093 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:11:31,094 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:11:31,123 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:11:31,123 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 17 treesize of output 21 [2022-11-23 14:11:31,204 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 23 treesize of output 1 [2022-11-23 14:11:31,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:31,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:31,267 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:11:31,268 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 34 [2022-11-23 14:11:31,282 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 23 treesize of output 1 [2022-11-23 14:11:31,307 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:11:31,308 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 34 [2022-11-23 14:11:31,376 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:11:31,376 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 50 treesize of output 61 [2022-11-23 14:11:31,440 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:11:31,440 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 50 treesize of output 61 [2022-11-23 14:11:31,463 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 13 treesize of output 9 [2022-11-23 14:11:31,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:31,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:31,627 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 23 treesize of output 1 [2022-11-23 14:11:32,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:32,050 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:11:32,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:11:32,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:32,086 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:11:32,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:11:32,103 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 23 treesize of output 1 [2022-11-23 14:11:34,641 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:11:34,641 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:11:34,680 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:11:34,681 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 17 treesize of output 21 [2022-11-23 14:11:34,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:34,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:34,783 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 23 treesize of output 1 [2022-11-23 14:11:34,821 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:11:34,822 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 34 [2022-11-23 14:11:34,852 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:11:34,852 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 34 [2022-11-23 14:11:34,867 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 23 treesize of output 1 [2022-11-23 14:11:34,900 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 13 treesize of output 9 [2022-11-23 14:11:34,953 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:11:34,953 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 50 treesize of output 61 [2022-11-23 14:11:35,018 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:11:35,018 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 50 treesize of output 61 [2022-11-23 14:11:35,547 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 23 treesize of output 1 [2022-11-23 14:11:35,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:35,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:11:35,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:35,999 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:11:35,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:11:36,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:36,040 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:11:36,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:11:36,059 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 23 treesize of output 1 [2022-11-23 14:11:36,461 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:11:36,461 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 17 treesize of output 21 [2022-11-23 14:11:36,484 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 17 treesize of output 19 [2022-11-23 14:11:36,552 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 69 for LOIs [2022-11-23 14:11:36,557 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:11:45,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37835#(and (<= |~#list~0.base| 3) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= ~i~0 0) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (<= |ULTIMATE.start_main_#t~ret22#1| 2147483647) (<= 0 ~i~0) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~head~0#1.offset|) (<= |#NULL.offset| 0) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (<= 0 (+ |ULTIMATE.start_main_#t~ret22#1| 2147483648)) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~head~0#1.offset| 0) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-23 14:11:45,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:11:45,538 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:11:45,538 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 34 [2022-11-23 14:11:45,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163990198] [2022-11-23 14:11:45,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:45,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:11:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:45,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:11:45,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=3734, Unknown=0, NotChecked=0, Total=4032 [2022-11-23 14:11:45,541 INFO L87 Difference]: Start difference. First operand 1628 states and 2383 transitions. Second operand has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:12:00,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:00,657 INFO L93 Difference]: Finished difference Result 3660 states and 5205 transitions. [2022-11-23 14:12:00,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-23 14:12:00,657 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-23 14:12:00,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:00,667 INFO L225 Difference]: With dead ends: 3660 [2022-11-23 14:12:00,668 INFO L226 Difference]: Without dead ends: 3660 [2022-11-23 14:12:00,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5896 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=2394, Invalid=16512, Unknown=0, NotChecked=0, Total=18906 [2022-11-23 14:12:00,673 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 6542 mSDsluCounter, 3194 mSDsCounter, 0 mSdLazyCounter, 4802 mSolverCounterSat, 610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6546 SdHoareTripleChecker+Valid, 3366 SdHoareTripleChecker+Invalid, 5412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 4802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:00,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6546 Valid, 3366 Invalid, 5412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 4802 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-11-23 14:12:00,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3660 states. [2022-11-23 14:12:00,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3660 to 1818. [2022-11-23 14:12:00,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1629 states have (on average 1.5187231430325352) internal successors, (2474), 1686 states have internal predecessors, (2474), 98 states have call successors, (98), 54 states have call predecessors, (98), 54 states have return successors, (98), 77 states have call predecessors, (98), 98 states have call successors, (98) [2022-11-23 14:12:00,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 2670 transitions. [2022-11-23 14:12:00,729 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 2670 transitions. Word has length 36 [2022-11-23 14:12:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:00,730 INFO L495 AbstractCegarLoop]: Abstraction has 1818 states and 2670 transitions. [2022-11-23 14:12:00,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 31 states have (on average 2.064516129032258) internal successors, (64), 32 states have internal predecessors, (64), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:12:00,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 2670 transitions. [2022-11-23 14:12:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 14:12:00,731 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:00,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:00,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:00,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-23 14:12:00,937 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:12:00,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:00,937 INFO L85 PathProgramCache]: Analyzing trace with hash -729963439, now seen corresponding path program 1 times [2022-11-23 14:12:00,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:00,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753690949] [2022-11-23 14:12:00,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:00,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:12:02,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:02,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753690949] [2022-11-23 14:12:02,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753690949] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:02,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499578133] [2022-11-23 14:12:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:02,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:02,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:02,567 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:02,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:12:02,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:02,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-23 14:12:02,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:02,872 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 14:12:02,872 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 [2022-11-23 14:12:02,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:12:02,964 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:12:02,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:12:03,171 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 14:12:03,171 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 23 treesize of output 30 [2022-11-23 14:12:03,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:03,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:03,927 INFO L321 Elim1Store]: treesize reduction 31, result has 38.0 percent of original size [2022-11-23 14:12:03,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 66 [2022-11-23 14:12:03,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:03,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 39 [2022-11-23 14:12:04,429 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:12:04,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2022-11-23 14:12:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:04,449 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:12:04,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 61 [2022-11-23 14:12:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:12:04,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:05,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:05,634 INFO L321 Elim1Store]: treesize reduction 12, result has 83.6 percent of original size [2022-11-23 14:12:05,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 213 [2022-11-23 14:12:17,444 WARN L233 SmtUtils]: Spent 6.47s on a formula simplification. DAG size of input: 61 DAG size of output: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:12:18,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499578133] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:18,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1188977564] [2022-11-23 14:12:18,545 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-23 14:12:18,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:12:18,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:12:18,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:12:18,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:12:19,159 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:12:19,160 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:12:19,190 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:12:19,190 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 17 treesize of output 21 [2022-11-23 14:12:19,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:12:19,275 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 27 treesize of output 26 [2022-11-23 14:12:19,288 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 27 treesize of output 26 [2022-11-23 14:12:19,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:12:19,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:12:19,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:12:19,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:12:19,424 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:12:19,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,443 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:12:19,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:12:19,541 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 33 treesize of output 13 [2022-11-23 14:12:19,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:12:19,670 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 33 treesize of output 13 [2022-11-23 14:12:19,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:19,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-23 14:12:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:19,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-23 14:12:20,641 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:12:20,641 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:12:20,674 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:12:20,674 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 17 treesize of output 21 [2022-11-23 14:12:20,796 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 27 treesize of output 26 [2022-11-23 14:12:20,810 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 27 treesize of output 26 [2022-11-23 14:12:20,827 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:12:20,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,877 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:12:20,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:12:20,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:12:20,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:12:21,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:21,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:21,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:21,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:12:21,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:12:21,104 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 33 treesize of output 13 [2022-11-23 14:12:21,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:21,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:12:21,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:21,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:12:21,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:12:21,278 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 23 treesize of output 1 [2022-11-23 14:12:21,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:12:22,340 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:12:22,340 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 17 treesize of output 21 [2022-11-23 14:12:22,381 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 17 treesize of output 19 [2022-11-23 14:12:22,481 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 27 treesize of output 26 [2022-11-23 14:12:22,501 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 27 treesize of output 26 [2022-11-23 14:12:22,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:12:22,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:12:22,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:12:22,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:12:22,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:12:22,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:12:22,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:12:22,780 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 33 treesize of output 13 [2022-11-23 14:12:22,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:12:22,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:22,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:12:22,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:12:22,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:12:22,933 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 23 treesize of output 1 [2022-11-23 14:12:23,778 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:12:23,778 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:12:23,808 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:12:23,809 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 17 treesize of output 21 [2022-11-23 14:12:23,889 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 27 treesize of output 26 [2022-11-23 14:12:23,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:12:23,914 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 27 treesize of output 26 [2022-11-23 14:12:23,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:12:23,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:23,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:12:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:23,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:12:24,058 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 13 treesize of output 9 [2022-11-23 14:12:24,066 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 19 treesize of output 1 [2022-11-23 14:12:24,074 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 19 treesize of output 1 [2022-11-23 14:12:24,132 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:12:24,133 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 33 treesize of output 27 [2022-11-23 14:12:24,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:12:24,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:12:24,195 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-23 14:12:24,197 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:12:32,335 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43721#(and (= |~#list~0.offset| 0) (not (< |ULTIMATE.start_main_~cursor~0#1.base| |#StackHeapBarrier|)) (= (select |#valid| |~#list~0.base|) 1) (= |ULTIMATE.start_main_~next~1#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~cursor~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~0#1.offset|))) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (= 0 |ULTIMATE.start_main_~cursor~0#1.offset|) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1) (<= (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) 4 |ULTIMATE.start_main_~cursor~0#1.offset|) (select |#length| |ULTIMATE.start_main_~cursor~0#1.base|)) (= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_main_~next~1#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~cursor~0#1.base|) (+ (* 4 |ULTIMATE.start_main_~direction~0#1|) |ULTIMATE.start_main_~cursor~0#1.offset|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:12:32,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:12:32,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:12:32,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2022-11-23 14:12:32,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030151034] [2022-11-23 14:12:32,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:32,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-23 14:12:32,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:32,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-23 14:12:32,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=4375, Unknown=3, NotChecked=0, Total=4692 [2022-11-23 14:12:32,337 INFO L87 Difference]: Start difference. First operand 1818 states and 2670 transitions. Second operand has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 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) [2022-11-23 14:12:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:44,361 INFO L93 Difference]: Finished difference Result 3529 states and 5085 transitions. [2022-11-23 14:12:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 14:12:44,361 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 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 36 [2022-11-23 14:12:44,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:44,373 INFO L225 Difference]: With dead ends: 3529 [2022-11-23 14:12:44,373 INFO L226 Difference]: Without dead ends: 3529 [2022-11-23 14:12:44,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3317 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=1208, Invalid=10779, Unknown=3, NotChecked=0, Total=11990 [2022-11-23 14:12:44,376 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2341 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 3134 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 2621 SdHoareTripleChecker+Invalid, 3305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 3134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:44,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2341 Valid, 2621 Invalid, 3305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 3134 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-11-23 14:12:44,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2022-11-23 14:12:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 2295. [2022-11-23 14:12:44,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2295 states, 2061 states have (on average 1.522561863173217) internal successors, (3138), 2131 states have internal predecessors, (3138), 127 states have call successors, (127), 70 states have call predecessors, (127), 70 states have return successors, (127), 93 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-23 14:12:44,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3392 transitions. [2022-11-23 14:12:44,436 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3392 transitions. Word has length 36 [2022-11-23 14:12:44,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:44,436 INFO L495 AbstractCegarLoop]: Abstraction has 2295 states and 3392 transitions. [2022-11-23 14:12:44,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 29 states have internal predecessors, (68), 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) [2022-11-23 14:12:44,436 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3392 transitions. [2022-11-23 14:12:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:12:44,437 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:44,438 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:44,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:44,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:44,643 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:12:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1726358473, now seen corresponding path program 1 times [2022-11-23 14:12:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:44,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941968641] [2022-11-23 14:12:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:44,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:44,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:12:44,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:44,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941968641] [2022-11-23 14:12:44,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941968641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:44,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:12:44,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:12:44,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673977910] [2022-11-23 14:12:44,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:44,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:12:44,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:44,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:12:44,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:12:44,968 INFO L87 Difference]: Start difference. First operand 2295 states and 3392 transitions. Second operand has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:12:45,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:45,263 INFO L93 Difference]: Finished difference Result 2467 states and 3545 transitions. [2022-11-23 14:12:45,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:12:45,271 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-11-23 14:12:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:45,293 INFO L225 Difference]: With dead ends: 2467 [2022-11-23 14:12:45,293 INFO L226 Difference]: Without dead ends: 2467 [2022-11-23 14:12:45,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:12:45,294 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 458 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:45,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 186 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:12:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2022-11-23 14:12:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2293. [2022-11-23 14:12:45,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2293 states, 2061 states have (on average 1.490538573508006) internal successors, (3072), 2129 states have internal predecessors, (3072), 127 states have call successors, (127), 70 states have call predecessors, (127), 70 states have return successors, (127), 93 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-23 14:12:45,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3326 transitions. [2022-11-23 14:12:45,336 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3326 transitions. Word has length 37 [2022-11-23 14:12:45,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:45,337 INFO L495 AbstractCegarLoop]: Abstraction has 2293 states and 3326 transitions. [2022-11-23 14:12:45,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.571428571428571) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:12:45,337 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3326 transitions. [2022-11-23 14:12:45,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:12:45,338 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:45,338 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:45,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-23 14:12:45,338 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:12:45,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:45,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1390699727, now seen corresponding path program 2 times [2022-11-23 14:12:45,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:45,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847783992] [2022-11-23 14:12:45,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:45,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:12:45,438 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:45,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847783992] [2022-11-23 14:12:45,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847783992] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:45,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49215243] [2022-11-23 14:12:45,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:12:45,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:45,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:45,440 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:45,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:12:45,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-23 14:12:45,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:45,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:12:45,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:46,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:46,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:46,145 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:12:46,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 123 [2022-11-23 14:12:46,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:46,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:46,168 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:12:46,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 91 [2022-11-23 14:12:46,331 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:12:46,331 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:12:46,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49215243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:12:46,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:12:46,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 14 [2022-11-23 14:12:46,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596208238] [2022-11-23 14:12:46,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:12:46,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:12:46,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:12:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:12:46,332 INFO L87 Difference]: Start difference. First operand 2293 states and 3326 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2022-11-23 14:12:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:46,945 INFO L93 Difference]: Finished difference Result 2318 states and 3350 transitions. [2022-11-23 14:12:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:12:46,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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 37 [2022-11-23 14:12:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:46,951 INFO L225 Difference]: With dead ends: 2318 [2022-11-23 14:12:46,951 INFO L226 Difference]: Without dead ends: 2316 [2022-11-23 14:12:46,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:12:46,952 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 138 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 450 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:46,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 450 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:12:46,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2022-11-23 14:12:46,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 2213. [2022-11-23 14:12:46,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2213 states, 1990 states have (on average 1.4944723618090452) internal successors, (2974), 2055 states have internal predecessors, (2974), 121 states have call successors, (121), 67 states have call predecessors, (121), 67 states have return successors, (121), 90 states have call predecessors, (121), 121 states have call successors, (121) [2022-11-23 14:12:46,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2213 states to 2213 states and 3216 transitions. [2022-11-23 14:12:46,992 INFO L78 Accepts]: Start accepts. Automaton has 2213 states and 3216 transitions. Word has length 37 [2022-11-23 14:12:46,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:46,993 INFO L495 AbstractCegarLoop]: Abstraction has 2213 states and 3216 transitions. [2022-11-23 14:12:46,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 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) [2022-11-23 14:12:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 2213 states and 3216 transitions. [2022-11-23 14:12:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:12:46,994 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:46,994 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:47,003 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-23 14:12:47,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-23 14:12:47,199 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:12:47,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:47,199 INFO L85 PathProgramCache]: Analyzing trace with hash -921102663, now seen corresponding path program 1 times [2022-11-23 14:12:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:47,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557583249] [2022-11-23 14:12:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:47,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:48,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:12:48,924 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557583249] [2022-11-23 14:12:48,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557583249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:48,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759508223] [2022-11-23 14:12:48,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:48,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:48,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:48,926 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:48,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:12:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 14:12:49,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:49,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:12:49,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:49,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 34 [2022-11-23 14:12:49,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:49,968 INFO L321 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2022-11-23 14:12:49,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 21 [2022-11-23 14:12:50,008 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 13 treesize of output 9 [2022-11-23 14:12:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:12:50,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:50,346 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 150 treesize of output 142 [2022-11-23 14:12:50,459 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 134 treesize of output 126 [2022-11-23 14:15:08,713 WARN L233 SmtUtils]: Spent 2.30m on a formula simplification. DAG size of input: 71 DAG size of output: 53 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:16:00,571 WARN L233 SmtUtils]: Spent 47.74s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:16:54,901 WARN L233 SmtUtils]: Spent 48.14s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:17:27,306 WARN L233 SmtUtils]: Spent 32.10s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:17:35,474 WARN L233 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 43 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 14:17:37,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759508223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:17:37,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [523254270] [2022-11-23 14:17:37,613 INFO L159 IcfgInterpreter]: Started Sifa with 35 locations of interest [2022-11-23 14:17:37,613 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:17:37,613 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:17:37,613 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:17:37,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:17:38,234 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:17:38,235 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 17 treesize of output 21 [2022-11-23 14:17:38,246 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 17 treesize of output 19 [2022-11-23 14:17:38,313 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 27 treesize of output 26 [2022-11-23 14:17:38,328 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 27 treesize of output 26 [2022-11-23 14:17:38,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:38,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:38,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:38,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:38,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:38,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:17:38,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:38,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:38,593 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 33 treesize of output 13 [2022-11-23 14:17:38,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:38,723 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 33 treesize of output 13 [2022-11-23 14:17:38,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:17:38,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-23 14:17:38,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:17:38,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:38,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-23 14:17:39,717 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:17:39,718 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:17:39,790 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:17:39,791 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 17 treesize of output 21 [2022-11-23 14:17:39,911 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 27 treesize of output 26 [2022-11-23 14:17:39,941 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 27 treesize of output 26 [2022-11-23 14:17:39,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:39,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:39,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:40,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:40,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:40,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:40,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:17:40,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:40,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:40,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:40,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:40,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:40,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:40,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:40,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:40,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:40,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:40,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:40,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:40,302 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 33 treesize of output 13 [2022-11-23 14:17:40,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:17:40,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:17:40,417 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 23 treesize of output 1 [2022-11-23 14:17:41,473 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:17:41,473 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 17 treesize of output 21 [2022-11-23 14:17:41,485 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 17 treesize of output 19 [2022-11-23 14:17:41,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:41,592 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 27 treesize of output 26 [2022-11-23 14:17:41,614 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 27 treesize of output 26 [2022-11-23 14:17:41,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:41,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:41,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,703 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:41,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:17:41,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:41,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:41,890 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 33 treesize of output 13 [2022-11-23 14:17:41,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:41,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:41,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:42,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:17:42,043 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 23 treesize of output 1 [2022-11-23 14:17:42,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:17:42,760 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-23 14:17:42,761 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 33 treesize of output 37 [2022-11-23 14:17:42,795 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-23 14:17:42,823 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-23 14:17:42,996 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:17:42,996 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:17:43,033 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:17:43,033 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 17 treesize of output 21 [2022-11-23 14:17:43,107 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 27 treesize of output 26 [2022-11-23 14:17:43,127 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:43,140 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 27 treesize of output 26 [2022-11-23 14:17:43,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:43,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:43,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:43,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:43,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:43,266 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 19 treesize of output 1 [2022-11-23 14:17:43,275 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 19 treesize of output 1 [2022-11-23 14:17:43,285 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 13 treesize of output 9 [2022-11-23 14:17:43,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:17:43,363 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:17:43,364 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 33 treesize of output 27 [2022-11-23 14:17:43,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:17:43,415 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-23 14:17:43,417 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:17:51,000 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '59338#(and (= |~#list~0.offset| 0) (= 3 |~#list~0.base|) (<= 0 ~i~0) (not (< 0 |ULTIMATE.start_main_~length~0#1|)) (<= 0 (+ |ULTIMATE.start_main_~length~0#1| 1)) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (= |ULTIMATE.start_main_~y~0#1| 0) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:17:51,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:17:51,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:17:51,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 27 [2022-11-23 14:17:51,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213942155] [2022-11-23 14:17:51,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:17:51,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-23 14:17:51,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:17:51,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-23 14:17:51,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=3848, Unknown=6, NotChecked=0, Total=4160 [2022-11-23 14:17:51,003 INFO L87 Difference]: Start difference. First operand 2213 states and 3216 transitions. Second operand has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 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) [2022-11-23 14:17:54,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:17:54,439 INFO L93 Difference]: Finished difference Result 2335 states and 3366 transitions. [2022-11-23 14:17:54,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 14:17:54,439 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 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 39 [2022-11-23 14:17:54,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:17:54,445 INFO L225 Difference]: With dead ends: 2335 [2022-11-23 14:17:54,445 INFO L226 Difference]: Without dead ends: 2334 [2022-11-23 14:17:54,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1816 ImplicationChecksByTransitivity, 296.9s TimeCoverageRelationStatistics Valid=557, Invalid=5443, Unknown=6, NotChecked=0, Total=6006 [2022-11-23 14:17:54,447 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1319 mSDsluCounter, 882 mSDsCounter, 0 mSdLazyCounter, 1475 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1321 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 1578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:17:54,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1321 Valid, 987 Invalid, 1578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1475 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 14:17:54,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2334 states. [2022-11-23 14:17:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2334 to 2219. [2022-11-23 14:17:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 1996 states have (on average 1.4934869739478958) internal successors, (2981), 2061 states have internal predecessors, (2981), 121 states have call successors, (121), 67 states have call predecessors, (121), 67 states have return successors, (121), 90 states have call predecessors, (121), 121 states have call successors, (121) [2022-11-23 14:17:54,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 3223 transitions. [2022-11-23 14:17:54,515 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 3223 transitions. Word has length 39 [2022-11-23 14:17:54,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:17:54,516 INFO L495 AbstractCegarLoop]: Abstraction has 2219 states and 3223 transitions. [2022-11-23 14:17:54,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.6923076923076925) internal successors, (70), 26 states have internal predecessors, (70), 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) [2022-11-23 14:17:54,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 3223 transitions. [2022-11-23 14:17:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-23 14:17:54,518 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:17:54,518 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:17:54,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:17:54,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-23 14:17:54,725 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:17:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:17:54,725 INFO L85 PathProgramCache]: Analyzing trace with hash -921103948, now seen corresponding path program 1 times [2022-11-23 14:17:54,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:17:54,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464968325] [2022-11-23 14:17:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:17:54,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:17:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:54,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:17:54,803 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:17:54,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464968325] [2022-11-23 14:17:54,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464968325] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:17:54,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307252060] [2022-11-23 14:17:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:17:54,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:17:54,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:17:54,805 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:17:54,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:17:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:55,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:17:55,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:17:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:17:55,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:17:55,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:17:55,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307252060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:17:55,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1175849610] [2022-11-23 14:17:55,175 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-23 14:17:55,175 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:17:55,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:17:55,176 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:17:55,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:17:55,799 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:17:55,799 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 17 treesize of output 21 [2022-11-23 14:17:55,814 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 17 treesize of output 19 [2022-11-23 14:17:55,903 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 27 treesize of output 26 [2022-11-23 14:17:55,923 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 27 treesize of output 26 [2022-11-23 14:17:55,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:55,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:55,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:55,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:55,992 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:56,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:56,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:17:56,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:56,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:56,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:56,176 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 33 treesize of output 13 [2022-11-23 14:17:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:56,290 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 33 treesize of output 13 [2022-11-23 14:17:56,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:17:56,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-23 14:17:56,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:17:56,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:56,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-23 14:17:57,149 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:17:57,149 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:17:57,185 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:17:57,185 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 17 treesize of output 21 [2022-11-23 14:17:57,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:57,277 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 27 treesize of output 26 [2022-11-23 14:17:57,292 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 27 treesize of output 26 [2022-11-23 14:17:57,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:57,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:57,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:57,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:17:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:57,529 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 33 treesize of output 13 [2022-11-23 14:17:57,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:57,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:57,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:57,648 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 23 treesize of output 1 [2022-11-23 14:17:57,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:17:57,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:17:58,705 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:17:58,705 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 17 treesize of output 21 [2022-11-23 14:17:58,719 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 17 treesize of output 19 [2022-11-23 14:17:58,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:58,844 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 27 treesize of output 26 [2022-11-23 14:17:58,860 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 27 treesize of output 26 [2022-11-23 14:17:58,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:58,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:58,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:17:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:58,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:17:58,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:58,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:58,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:58,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:59,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:17:59,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:59,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:59,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:59,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:17:59,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:59,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:59,168 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 33 treesize of output 13 [2022-11-23 14:17:59,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:17:59,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:17:59,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:17:59,280 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 23 treesize of output 1 [2022-11-23 14:17:59,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:17:59,987 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-23 14:17:59,987 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 33 treesize of output 37 [2022-11-23 14:18:00,028 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-23 14:18:00,056 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 0 case distinctions, treesize of input 16 treesize of output 13 [2022-11-23 14:18:00,230 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:18:00,231 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:18:00,264 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:18:00,265 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 17 treesize of output 21 [2022-11-23 14:18:00,345 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 27 treesize of output 26 [2022-11-23 14:18:00,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:18:00,372 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 27 treesize of output 26 [2022-11-23 14:18:00,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:18:00,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:00,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:18:00,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:00,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:18:00,508 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 19 treesize of output 1 [2022-11-23 14:18:00,517 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 19 treesize of output 1 [2022-11-23 14:18:00,525 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 13 treesize of output 9 [2022-11-23 14:18:00,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:18:00,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:18:00,634 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:18:00,634 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 33 treesize of output 27 [2022-11-23 14:18:00,681 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-23 14:18:00,683 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:18:05,858 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '64178#(and (= |~#list~0.offset| 0) (= 3 |~#list~0.base|) (<= 0 ~i~0) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1)) (= |ULTIMATE.start_main_~y~0#1| 0) (<= 0 |ULTIMATE.start_main_~length~0#1|) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:18:05,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:18:05,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:18:05,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 5 [2022-11-23 14:18:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221724851] [2022-11-23 14:18:05,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:18:05,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:18:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:18:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:18:05,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-11-23 14:18:05,860 INFO L87 Difference]: Start difference. First operand 2219 states and 3223 transitions. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:18:06,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:06,062 INFO L93 Difference]: Finished difference Result 3876 states and 5664 transitions. [2022-11-23 14:18:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:18:06,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-23 14:18:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:06,071 INFO L225 Difference]: With dead ends: 3876 [2022-11-23 14:18:06,071 INFO L226 Difference]: Without dead ends: 3868 [2022-11-23 14:18:06,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2022-11-23 14:18:06,072 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 329 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:06,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [333 Valid, 409 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:18:06,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3868 states. [2022-11-23 14:18:06,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3868 to 3013. [2022-11-23 14:18:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 2745 states have (on average 1.5074681238615666) internal successors, (4138), 2818 states have internal predecessors, (4138), 166 states have call successors, (166), 67 states have call predecessors, (166), 67 states have return successors, (166), 127 states have call predecessors, (166), 166 states have call successors, (166) [2022-11-23 14:18:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 4470 transitions. [2022-11-23 14:18:06,127 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 4470 transitions. Word has length 39 [2022-11-23 14:18:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:06,127 INFO L495 AbstractCegarLoop]: Abstraction has 3013 states and 4470 transitions. [2022-11-23 14:18:06,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:18:06,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 4470 transitions. [2022-11-23 14:18:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:18:06,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:06,130 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 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] [2022-11-23 14:18:06,136 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:18:06,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-11-23 14:18:06,336 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:18:06,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:06,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1576652340, now seen corresponding path program 1 times [2022-11-23 14:18:06,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:18:06,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937464312] [2022-11-23 14:18:06,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:06,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:18:06,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:06,460 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:18:06,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:18:06,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937464312] [2022-11-23 14:18:06,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937464312] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:18:06,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993124447] [2022-11-23 14:18:06,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:06,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:06,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:18:06,462 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:18:06,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:18:06,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:06,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:18:06,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:06,843 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:18:06,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:18:06,870 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-23 14:18:06,871 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 12 treesize of output 11 [2022-11-23 14:18:06,899 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:18:06,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993124447] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:18:06,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1350352992] [2022-11-23 14:18:06,901 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-23 14:18:06,901 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:18:06,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:18:06,902 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:18:06,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:18:07,616 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-23 14:18:07,616 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-23 14:18:07,786 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-23 14:18:07,786 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-23 14:18:08,136 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 27 for LOIs [2022-11-23 14:18:08,141 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:18:14,802 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71345#(and (= |~#list~0.offset| 0) (<= |ULTIMATE.start_is_empty_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_is_empty_#in~list#1.offset|) (<= 3 |ULTIMATE.start_is_empty_#in~list#1.base|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= |ULTIMATE.start_remove_one_#in~list#1.base| 3) (<= 0 (+ |ULTIMATE.start_main_#t~ret27#1| 2147483648)) (not (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1)) (<= 3 |ULTIMATE.start_is_empty_~list#1.base|) (= |ULTIMATE.start_main_~y~0#1| 0) (<= |ULTIMATE.start_is_empty_#in~list#1.base| 3) (<= 0 |ULTIMATE.start_remove_one_~list#1.offset|) (<= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 (+ |ULTIMATE.start_remove_one_~from#1| 2147483648)) (<= |ULTIMATE.start_remove_one_~from#1| 2147483647) (<= 3 |ULTIMATE.start_remove_one_#in~list#1.base|) (<= |ULTIMATE.start_main_#t~ret27#1| 2147483647) (<= |ULTIMATE.start_remove_one_~list#1.base| 3) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 (+ |ULTIMATE.start_remove_one_#in~from#1| 2147483648)) (<= 0 |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= |ULTIMATE.start_remove_one_#in~from#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_is_empty_~list#1.offset|) (<= 3 |ULTIMATE.start_remove_one_~list#1.base|) (<= |ULTIMATE.start_is_empty_~list#1.base| 3) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_remove_one_#in~list#1.offset| 0) (= |ULTIMATE.start_main_~length~0#1| 0) (<= |ULTIMATE.start_remove_one_~list#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:18:14,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:18:14,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:18:14,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-23 14:18:14,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664803477] [2022-11-23 14:18:14,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:18:14,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 14:18:14,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:18:14,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 14:18:14,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=818, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 14:18:14,804 INFO L87 Difference]: Start difference. First operand 3013 states and 4470 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:18:15,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:15,965 INFO L93 Difference]: Finished difference Result 9214 states and 13357 transitions. [2022-11-23 14:18:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:18:15,965 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-23 14:18:15,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:15,988 INFO L225 Difference]: With dead ends: 9214 [2022-11-23 14:18:15,989 INFO L226 Difference]: Without dead ends: 9214 [2022-11-23 14:18:15,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 91 SyntacticMatches, 10 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=468, Invalid=1338, Unknown=0, NotChecked=0, Total=1806 [2022-11-23 14:18:15,990 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 1409 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1411 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:15,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1411 Valid, 542 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:18:15,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9214 states. [2022-11-23 14:18:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9214 to 4038. [2022-11-23 14:18:16,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4038 states, 3659 states have (on average 1.4129543591145122) internal successors, (5170), 3744 states have internal predecessors, (5170), 251 states have call successors, (251), 99 states have call predecessors, (251), 99 states have return successors, (251), 194 states have call predecessors, (251), 251 states have call successors, (251) [2022-11-23 14:18:16,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4038 states to 4038 states and 5672 transitions. [2022-11-23 14:18:16,130 INFO L78 Accepts]: Start accepts. Automaton has 4038 states and 5672 transitions. Word has length 41 [2022-11-23 14:18:16,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:16,131 INFO L495 AbstractCegarLoop]: Abstraction has 4038 states and 5672 transitions. [2022-11-23 14:18:16,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:18:16,131 INFO L276 IsEmpty]: Start isEmpty. Operand 4038 states and 5672 transitions. [2022-11-23 14:18:16,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-23 14:18:16,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:16,132 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:18:16,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-23 14:18:16,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-11-23 14:18:16,338 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:18:16,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:16,339 INFO L85 PathProgramCache]: Analyzing trace with hash 2121445166, now seen corresponding path program 1 times [2022-11-23 14:18:16,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:18:16,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689403062] [2022-11-23 14:18:16,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:16,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:18:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:18:17,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:18:17,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689403062] [2022-11-23 14:18:17,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689403062] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:18:17,559 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:18:17,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-23 14:18:17,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618991043] [2022-11-23 14:18:17,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:18:17,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 14:18:17,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:18:17,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 14:18:17,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:18:17,560 INFO L87 Difference]: Start difference. First operand 4038 states and 5672 transitions. Second operand has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-11-23 14:18:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:18,567 INFO L93 Difference]: Finished difference Result 3394 states and 4749 transitions. [2022-11-23 14:18:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:18:18,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 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 40 [2022-11-23 14:18:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:18,583 INFO L225 Difference]: With dead ends: 3394 [2022-11-23 14:18:18,583 INFO L226 Difference]: Without dead ends: 3394 [2022-11-23 14:18:18,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:18:18,584 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 95 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:18,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 458 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:18:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3394 states. [2022-11-23 14:18:18,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3394 to 3383. [2022-11-23 14:18:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 3063 states have (on average 1.4126673196212862) internal successors, (4327), 3140 states have internal predecessors, (4327), 209 states have call successors, (209), 82 states have call predecessors, (209), 82 states have return successors, (209), 160 states have call predecessors, (209), 209 states have call successors, (209) [2022-11-23 14:18:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 4745 transitions. [2022-11-23 14:18:18,663 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 4745 transitions. Word has length 40 [2022-11-23 14:18:18,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:18,665 INFO L495 AbstractCegarLoop]: Abstraction has 3383 states and 4745 transitions. [2022-11-23 14:18:18,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 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) [2022-11-23 14:18:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 4745 transitions. [2022-11-23 14:18:18,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:18:18,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:18,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:18:18,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-23 14:18:18,667 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr40REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:18:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2086654320, now seen corresponding path program 1 times [2022-11-23 14:18:18,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:18:18,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68056626] [2022-11-23 14:18:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:18:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:18:20,520 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:18:20,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68056626] [2022-11-23 14:18:20,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68056626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:18:20,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228697539] [2022-11-23 14:18:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:20,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:20,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:18:20,521 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:18:20,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 14:18:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:20,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 14:18:20,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:20,899 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 [2022-11-23 14:18:21,199 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 11 [2022-11-23 14:18:21,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:21,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 35 [2022-11-23 14:18:21,862 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 31 treesize of output 13 [2022-11-23 14:18:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:18:21,902 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:18:21,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228697539] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:18:21,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:18:21,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [17] total 32 [2022-11-23 14:18:21,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274160489] [2022-11-23 14:18:21,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:18:21,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:18:21,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:18:21,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:18:21,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:18:21,904 INFO L87 Difference]: Start difference. First operand 3383 states and 4745 transitions. Second operand has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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) [2022-11-23 14:18:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:24,345 INFO L93 Difference]: Finished difference Result 3864 states and 5422 transitions. [2022-11-23 14:18:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-23 14:18:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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 41 [2022-11-23 14:18:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:24,353 INFO L225 Difference]: With dead ends: 3864 [2022-11-23 14:18:24,353 INFO L226 Difference]: Without dead ends: 3864 [2022-11-23 14:18:24,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=395, Invalid=2055, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 14:18:24,354 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 619 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:24,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [623 Valid, 858 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:18:24,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2022-11-23 14:18:24,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3501. [2022-11-23 14:18:24,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3501 states, 3181 states have (on average 1.4168500471549828) internal successors, (4507), 3258 states have internal predecessors, (4507), 209 states have call successors, (209), 82 states have call predecessors, (209), 82 states have return successors, (209), 160 states have call predecessors, (209), 209 states have call successors, (209) [2022-11-23 14:18:24,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3501 states to 3501 states and 4925 transitions. [2022-11-23 14:18:24,416 INFO L78 Accepts]: Start accepts. Automaton has 3501 states and 4925 transitions. Word has length 41 [2022-11-23 14:18:24,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:24,417 INFO L495 AbstractCegarLoop]: Abstraction has 3501 states and 4925 transitions. [2022-11-23 14:18:24,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 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) [2022-11-23 14:18:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3501 states and 4925 transitions. [2022-11-23 14:18:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:18:24,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:24,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:18:24,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:18:24,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-23 14:18:24,624 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr41REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:18:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:24,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2086654321, now seen corresponding path program 1 times [2022-11-23 14:18:24,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:18:24,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027634714] [2022-11-23 14:18:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:24,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:18:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:27,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:18:27,142 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:18:27,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027634714] [2022-11-23 14:18:27,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027634714] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:18:27,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93558608] [2022-11-23 14:18:27,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:27,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:27,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:18:27,145 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:18:27,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 14:18:27,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:27,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-23 14:18:27,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:27,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:18:27,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:18:27,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:18:28,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:28,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 14:18:28,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:28,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-23 14:18:28,616 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 19 treesize of output 7 [2022-11-23 14:18:28,620 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 21 treesize of output 9 [2022-11-23 14:18:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:18:28,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:18:28,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93558608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:18:28,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:18:28,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [19] total 33 [2022-11-23 14:18:28,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815566652] [2022-11-23 14:18:28,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:18:28,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 14:18:28,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:18:28,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 14:18:28,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2022-11-23 14:18:28,675 INFO L87 Difference]: Start difference. First operand 3501 states and 4925 transitions. Second operand has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2022-11-23 14:18:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:32,012 INFO L93 Difference]: Finished difference Result 4284 states and 6000 transitions. [2022-11-23 14:18:32,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 14:18:32,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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 41 [2022-11-23 14:18:32,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:32,024 INFO L225 Difference]: With dead ends: 4284 [2022-11-23 14:18:32,024 INFO L226 Difference]: Without dead ends: 4284 [2022-11-23 14:18:32,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=441, Invalid=2981, Unknown=0, NotChecked=0, Total=3422 [2022-11-23 14:18:32,025 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 927 mSDsluCounter, 785 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:32,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [929 Valid, 937 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1088 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:18:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4284 states. [2022-11-23 14:18:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4284 to 3699. [2022-11-23 14:18:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3699 states, 3363 states have (on average 1.4174843889384479) internal successors, (4767), 3444 states have internal predecessors, (4767), 221 states have call successors, (221), 86 states have call predecessors, (221), 86 states have return successors, (221), 168 states have call predecessors, (221), 221 states have call successors, (221) [2022-11-23 14:18:32,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3699 states to 3699 states and 5209 transitions. [2022-11-23 14:18:32,096 INFO L78 Accepts]: Start accepts. Automaton has 3699 states and 5209 transitions. Word has length 41 [2022-11-23 14:18:32,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:32,096 INFO L495 AbstractCegarLoop]: Abstraction has 3699 states and 5209 transitions. [2022-11-23 14:18:32,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 13 states have internal predecessors, (37), 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) [2022-11-23 14:18:32,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3699 states and 5209 transitions. [2022-11-23 14:18:32,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:18:32,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:32,098 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:18:32,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:18:32,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:32,304 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:18:32,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash 2086628751, now seen corresponding path program 1 times [2022-11-23 14:18:32,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:18:32,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143827554] [2022-11-23 14:18:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:32,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:18:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:18:33,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:18:33,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143827554] [2022-11-23 14:18:33,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143827554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:18:33,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:18:33,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-23 14:18:33,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965331855] [2022-11-23 14:18:33,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:18:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:18:33,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:18:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:18:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:18:33,072 INFO L87 Difference]: Start difference. First operand 3699 states and 5209 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:18:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:18:34,540 INFO L93 Difference]: Finished difference Result 5236 states and 7302 transitions. [2022-11-23 14:18:34,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 14:18:34,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2022-11-23 14:18:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:18:34,551 INFO L225 Difference]: With dead ends: 5236 [2022-11-23 14:18:34,551 INFO L226 Difference]: Without dead ends: 5236 [2022-11-23 14:18:34,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=458, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:18:34,552 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 843 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:18:34,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [843 Valid, 678 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:18:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5236 states. [2022-11-23 14:18:34,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5236 to 4743. [2022-11-23 14:18:34,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4743 states, 4321 states have (on average 1.4105531127053923) internal successors, (6095), 4413 states have internal predecessors, (6095), 285 states have call successors, (285), 108 states have call predecessors, (285), 108 states have return successors, (285), 221 states have call predecessors, (285), 285 states have call successors, (285) [2022-11-23 14:18:34,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4743 states to 4743 states and 6665 transitions. [2022-11-23 14:18:34,632 INFO L78 Accepts]: Start accepts. Automaton has 4743 states and 6665 transitions. Word has length 41 [2022-11-23 14:18:34,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:18:34,633 INFO L495 AbstractCegarLoop]: Abstraction has 4743 states and 6665 transitions. [2022-11-23 14:18:34,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 13 states have internal predecessors, (35), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:18:34,633 INFO L276 IsEmpty]: Start isEmpty. Operand 4743 states and 6665 transitions. [2022-11-23 14:18:34,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:18:34,634 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:18:34,634 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:18:34,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-23 14:18:34,635 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:18:34,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:18:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash 261777103, now seen corresponding path program 1 times [2022-11-23 14:18:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:18:34,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214643815] [2022-11-23 14:18:34,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:34,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:18:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:18:37,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:18:37,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214643815] [2022-11-23 14:18:37,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214643815] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:18:37,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688926044] [2022-11-23 14:18:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:18:37,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:18:37,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:18:37,191 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:18:37,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 14:18:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:18:37,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-23 14:18:37,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:18:37,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:18:37,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:18:38,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:38,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 23 [2022-11-23 14:18:38,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:38,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-23 14:18:38,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:38,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2022-11-23 14:18:38,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:38,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2022-11-23 14:18:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:18:38,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:18:39,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:39,011 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:18:39,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 477 treesize of output 413 [2022-11-23 14:18:39,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:39,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 247 [2022-11-23 14:18:39,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:18:39,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688926044] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:18:39,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [388642579] [2022-11-23 14:18:39,545 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-23 14:18:39,545 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:18:39,546 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:18:39,546 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:18:39,546 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:18:39,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:39,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 38 [2022-11-23 14:18:39,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:18:39,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:39,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:18:39,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:39,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2022-11-23 14:18:39,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:18:39,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 52 [2022-11-23 14:18:39,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:39,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-23 14:18:40,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 14:18:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:18:40,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 55 [2022-11-23 14:18:40,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:18:40,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:18:40,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 55 [2022-11-23 14:18:40,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-23 14:18:40,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:40,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:40,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-23 14:18:40,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:40,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,422 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:40,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 72 [2022-11-23 14:18:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:40,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:40,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-23 14:18:40,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:40,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:40,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:40,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 10 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-23 14:18:40,839 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:18:40,839 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 17 treesize of output 21 [2022-11-23 14:18:40,851 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 17 treesize of output 19 [2022-11-23 14:18:40,933 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 27 treesize of output 26 [2022-11-23 14:18:40,957 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 27 treesize of output 26 [2022-11-23 14:18:40,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:18:41,018 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:18:41,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-23 14:18:41,060 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:18:41,060 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-23 14:18:41,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:18:41,170 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:18:41,171 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 61 treesize of output 75 [2022-11-23 14:18:41,253 INFO L321 Elim1Store]: treesize reduction 48, result has 49.5 percent of original size [2022-11-23 14:18:41,253 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 61 treesize of output 75 [2022-11-23 14:18:41,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:18:42,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:18:42,675 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 23 treesize of output 1 [2022-11-23 14:18:43,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:18:44,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:18:44,027 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 23 treesize of output 1 [2022-11-23 14:18:44,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:18:44,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:44,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 27 [2022-11-23 14:18:44,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:44,306 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:18:44,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 21 [2022-11-23 14:18:44,404 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 23 treesize of output 1 [2022-11-23 14:18:44,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:44,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:18:44,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,447 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 27 treesize of output 26 [2022-11-23 14:18:44,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:44,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 57 [2022-11-23 14:18:44,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:44,537 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 14:18:44,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 38 treesize of output 44 [2022-11-23 14:18:44,564 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 23 treesize of output 1 [2022-11-23 14:18:44,606 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2022-11-23 14:18:44,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:18:44,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:44,677 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 14:18:44,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 47 [2022-11-23 14:18:44,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 60 [2022-11-23 14:18:44,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:18:44,914 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:18:44,914 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 53 treesize of output 54 [2022-11-23 14:18:44,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:18:44,941 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 33 treesize of output 13 [2022-11-23 14:18:45,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:18:45,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-23 14:18:45,136 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 23 treesize of output 1 [2022-11-23 14:18:45,857 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:18:45,857 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:18:45,892 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:18:45,892 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 17 treesize of output 21 [2022-11-23 14:18:45,992 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 27 treesize of output 26 [2022-11-23 14:18:46,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:18:46,025 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 27 treesize of output 26 [2022-11-23 14:18:46,095 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:18:46,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-23 14:18:46,134 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:18:46,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 48 [2022-11-23 14:18:46,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:18:46,219 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 13 treesize of output 9 [2022-11-23 14:18:46,235 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 19 treesize of output 1 [2022-11-23 14:18:46,245 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 19 treesize of output 1 [2022-11-23 14:18:46,311 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:18:46,311 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 33 treesize of output 27 [2022-11-23 14:18:46,330 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:18:46,350 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 11 [2022-11-23 14:18:46,490 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 20 for LOIs [2022-11-23 14:18:46,492 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:19:01,495 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117490#(and (<= (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4) 4) (select |#length| |ULTIMATE.start_remove_one_~item~2#1.base|)) (<= |~#list~0.base| 3) (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|) (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (<= ~i~0 0) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_~item~2#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* |ULTIMATE.start_remove_one_~from#1| 4)))) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~item~2#1.base|) (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4))) |ULTIMATE.start_remove_one_~next~0#1.offset|) (= |ULTIMATE.start_remove_one_~next~0#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~item~2#1.base|) (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4)))) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (or (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_END 4))))) (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_END 4)))))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_remove_one_~list#1.base|) (+ |ULTIMATE.start_remove_one_~list#1.offset| (* |ULTIMATE.start_remove_one_~from#1| 4))) |ULTIMATE.start_remove_one_~item~2#1.base|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (= (select |#valid| |ULTIMATE.start_remove_one_~item~2#1.base|) 1) (= |ULTIMATE.start_is_empty_~no_beg~0#1| |ULTIMATE.start_is_empty_#res#1|) (not (= (select |#valid| |ULTIMATE.start_remove_one_~next~0#1.base|) 1)) (<= 0 (+ |ULTIMATE.start_remove_one_~item~2#1.offset| (* |ULTIMATE.start_remove_one_~next_field~0#1| 4))) (= (ite (= ~unnamed1~0~LIST_END |ULTIMATE.start_remove_one_~from#1|) ~unnamed2~0~ITEM_NEXT ~unnamed2~0~ITEM_PREV) |ULTIMATE.start_remove_one_~term_field~1#1|) (<= |#NULL.base| 0) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |~#list~0.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (<= 0 (+ |ULTIMATE.start_remove_one_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (= (ite (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_remove_one_~from#1|) ~unnamed2~0~ITEM_NEXT ~unnamed2~0~ITEM_PREV) |ULTIMATE.start_remove_one_~next_field~0#1|))' at error location [2022-11-23 14:19:01,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:19:01,495 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:19:01,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13, 10] total 39 [2022-11-23 14:19:01,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497011034] [2022-11-23 14:19:01,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:19:01,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-23 14:19:01,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:01,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-23 14:19:01,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=5004, Unknown=0, NotChecked=0, Total=5402 [2022-11-23 14:19:01,498 INFO L87 Difference]: Start difference. First operand 4743 states and 6665 transitions. Second operand has 39 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:19:11,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:11,474 INFO L93 Difference]: Finished difference Result 7227 states and 10046 transitions. [2022-11-23 14:19:11,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-23 14:19:11,474 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 42 [2022-11-23 14:19:11,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:11,486 INFO L225 Difference]: With dead ends: 7227 [2022-11-23 14:19:11,487 INFO L226 Difference]: Without dead ends: 7227 [2022-11-23 14:19:11,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=1599, Invalid=13901, Unknown=0, NotChecked=0, Total=15500 [2022-11-23 14:19:11,489 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 2974 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 2712 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2976 SdHoareTripleChecker+Valid, 2603 SdHoareTripleChecker+Invalid, 3020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 2712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:11,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2976 Valid, 2603 Invalid, 3020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 2712 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-23 14:19:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7227 states. [2022-11-23 14:19:11,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7227 to 5076. [2022-11-23 14:19:11,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 4614 states have (on average 1.410056350238405) internal successors, (6506), 4722 states have internal predecessors, (6506), 317 states have call successors, (317), 116 states have call predecessors, (317), 116 states have return successors, (317), 237 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-23 14:19:11,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 7140 transitions. [2022-11-23 14:19:11,588 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 7140 transitions. Word has length 42 [2022-11-23 14:19:11,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:11,588 INFO L495 AbstractCegarLoop]: Abstraction has 5076 states and 7140 transitions. [2022-11-23 14:19:11,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 2.864864864864865) internal successors, (106), 37 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:19:11,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 7140 transitions. [2022-11-23 14:19:11,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-23 14:19:11,590 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:11,590 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:11,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:11,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:11,797 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:19:11,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash 260982050, now seen corresponding path program 1 times [2022-11-23 14:19:11,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:11,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018544470] [2022-11-23 14:19:11,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:11,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:19:12,373 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018544470] [2022-11-23 14:19:12,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018544470] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:19:12,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:19:12,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-23 14:19:12,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47463856] [2022-11-23 14:19:12,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:19:12,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:19:12,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:12,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:19:12,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:19:12,375 INFO L87 Difference]: Start difference. First operand 5076 states and 7140 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:19:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:14,170 INFO L93 Difference]: Finished difference Result 5798 states and 8032 transitions. [2022-11-23 14:19:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 14:19:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-11-23 14:19:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:14,180 INFO L225 Difference]: With dead ends: 5798 [2022-11-23 14:19:14,180 INFO L226 Difference]: Without dead ends: 5798 [2022-11-23 14:19:14,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 14:19:14,181 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 653 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 653 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:14,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [653 Valid, 838 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:19:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5798 states. [2022-11-23 14:19:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5798 to 5076. [2022-11-23 14:19:14,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5076 states, 4614 states have (on average 1.405504984828782) internal successors, (6485), 4722 states have internal predecessors, (6485), 317 states have call successors, (317), 116 states have call predecessors, (317), 116 states have return successors, (317), 237 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-23 14:19:14,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5076 states to 5076 states and 7119 transitions. [2022-11-23 14:19:14,268 INFO L78 Accepts]: Start accepts. Automaton has 5076 states and 7119 transitions. Word has length 42 [2022-11-23 14:19:14,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:14,268 INFO L495 AbstractCegarLoop]: Abstraction has 5076 states and 7119 transitions. [2022-11-23 14:19:14,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:19:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 5076 states and 7119 transitions. [2022-11-23 14:19:14,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 14:19:14,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:14,270 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:14,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-11-23 14:19:14,270 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:19:14,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash -499490831, now seen corresponding path program 1 times [2022-11-23 14:19:14,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:14,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524117614] [2022-11-23 14:19:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:14,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:14,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:14,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:19:14,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:14,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524117614] [2022-11-23 14:19:14,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524117614] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:19:14,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:19:14,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-23 14:19:14,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065792037] [2022-11-23 14:19:14,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:19:14,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:19:14,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:14,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:19:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:19:14,897 INFO L87 Difference]: Start difference. First operand 5076 states and 7119 transitions. Second operand has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:19:16,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:16,508 INFO L93 Difference]: Finished difference Result 5720 states and 7907 transitions. [2022-11-23 14:19:16,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-23 14:19:16,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-11-23 14:19:16,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:16,516 INFO L225 Difference]: With dead ends: 5720 [2022-11-23 14:19:16,516 INFO L226 Difference]: Without dead ends: 5720 [2022-11-23 14:19:16,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:19:16,517 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 593 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 1185 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:16,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 894 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1185 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:19:16,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5720 states. [2022-11-23 14:19:16,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5720 to 5231. [2022-11-23 14:19:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5231 states, 4769 states have (on average 1.3965191864122457) internal successors, (6660), 4877 states have internal predecessors, (6660), 317 states have call successors, (317), 116 states have call predecessors, (317), 116 states have return successors, (317), 237 states have call predecessors, (317), 317 states have call successors, (317) [2022-11-23 14:19:16,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5231 states to 5231 states and 7294 transitions. [2022-11-23 14:19:16,631 INFO L78 Accepts]: Start accepts. Automaton has 5231 states and 7294 transitions. Word has length 43 [2022-11-23 14:19:16,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:16,632 INFO L495 AbstractCegarLoop]: Abstraction has 5231 states and 7294 transitions. [2022-11-23 14:19:16,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 13 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:19:16,632 INFO L276 IsEmpty]: Start isEmpty. Operand 5231 states and 7294 transitions. [2022-11-23 14:19:16,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 14:19:16,633 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:16,633 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:16,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-11-23 14:19:16,634 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:19:16,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:16,634 INFO L85 PathProgramCache]: Analyzing trace with hash -27099674, now seen corresponding path program 1 times [2022-11-23 14:19:16,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:16,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643467877] [2022-11-23 14:19:16,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:16,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:16,726 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:19:16,726 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:16,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643467877] [2022-11-23 14:19:16,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643467877] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:19:16,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:19:16,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:19:16,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057300120] [2022-11-23 14:19:16,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:19:16,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:19:16,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:16,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:19:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:19:16,728 INFO L87 Difference]: Start difference. First operand 5231 states and 7294 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-11-23 14:19:16,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:16,869 INFO L93 Difference]: Finished difference Result 4875 states and 6893 transitions. [2022-11-23 14:19:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:19:16,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 43 [2022-11-23 14:19:16,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:16,877 INFO L225 Difference]: With dead ends: 4875 [2022-11-23 14:19:16,877 INFO L226 Difference]: Without dead ends: 4875 [2022-11-23 14:19:16,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:19:16,878 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 97 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:16,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 332 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:19:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-11-23 14:19:16,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3575. [2022-11-23 14:19:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3575 states, 3248 states have (on average 1.3934729064039408) internal successors, (4526), 3334 states have internal predecessors, (4526), 219 states have call successors, (219), 79 states have call predecessors, (219), 79 states have return successors, (219), 161 states have call predecessors, (219), 219 states have call successors, (219) [2022-11-23 14:19:16,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3575 states to 3575 states and 4964 transitions. [2022-11-23 14:19:16,946 INFO L78 Accepts]: Start accepts. Automaton has 3575 states and 4964 transitions. Word has length 43 [2022-11-23 14:19:16,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:16,946 INFO L495 AbstractCegarLoop]: Abstraction has 3575 states and 4964 transitions. [2022-11-23 14:19:16,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2022-11-23 14:19:16,946 INFO L276 IsEmpty]: Start isEmpty. Operand 3575 states and 4964 transitions. [2022-11-23 14:19:16,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 14:19:16,947 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:16,947 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:16,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-11-23 14:19:16,948 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:19:16,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:16,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1695653636, now seen corresponding path program 1 times [2022-11-23 14:19:16,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:16,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876883269] [2022-11-23 14:19:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:16,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:19:17,786 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:17,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876883269] [2022-11-23 14:19:17,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876883269] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:19:17,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:19:17,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-23 14:19:17,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010954810] [2022-11-23 14:19:17,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:19:17,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 14:19:17,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:17,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 14:19:17,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:19:17,788 INFO L87 Difference]: Start difference. First operand 3575 states and 4964 transitions. Second operand has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:19:21,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:21,895 INFO L93 Difference]: Finished difference Result 4995 states and 6733 transitions. [2022-11-23 14:19:21,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-23 14:19:21,904 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-11-23 14:19:21,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:21,911 INFO L225 Difference]: With dead ends: 4995 [2022-11-23 14:19:21,911 INFO L226 Difference]: Without dead ends: 4995 [2022-11-23 14:19:21,912 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=672, Invalid=2084, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 14:19:21,914 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 1230 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1230 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 2243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:21,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1230 Valid, 1358 Invalid, 2243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 14:19:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4995 states. [2022-11-23 14:19:21,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4995 to 4047. [2022-11-23 14:19:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 3692 states have (on average 1.3607800650054171) internal successors, (5024), 3774 states have internal predecessors, (5024), 243 states have call successors, (243), 87 states have call predecessors, (243), 87 states have return successors, (243), 185 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-23 14:19:21,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 5510 transitions. [2022-11-23 14:19:21,989 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 5510 transitions. Word has length 44 [2022-11-23 14:19:21,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:21,989 INFO L495 AbstractCegarLoop]: Abstraction has 4047 states and 5510 transitions. [2022-11-23 14:19:21,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 15 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:19:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 5510 transitions. [2022-11-23 14:19:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-23 14:19:21,991 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:21,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:21,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-11-23 14:19:21,992 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:19:21,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:21,992 INFO L85 PathProgramCache]: Analyzing trace with hash 201576609, now seen corresponding path program 1 times [2022-11-23 14:19:21,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:21,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378976109] [2022-11-23 14:19:21,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:21,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 14:19:22,159 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:22,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378976109] [2022-11-23 14:19:22,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378976109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:19:22,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437795724] [2022-11-23 14:19:22,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:22,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:22,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:19:22,164 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:19:22,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 14:19:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:22,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:19:22,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:22,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:22,792 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2022-11-23 14:19:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:19:22,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:23,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:19:23,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437795724] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:19:23,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2068331841] [2022-11-23 14:19:23,075 INFO L159 IcfgInterpreter]: Started Sifa with 33 locations of interest [2022-11-23 14:19:23,076 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:19:23,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:19:23,076 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:19:23,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:19:23,761 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-23 14:19:23,762 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-23 14:19:23,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:23,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:23,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:23,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:23,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:23,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:23,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 71 [2022-11-23 14:19:23,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:23,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:23,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:23,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:23,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:23,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:23,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2022-11-23 14:19:23,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:19:23,936 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 14 treesize of output 10 [2022-11-23 14:19:23,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:19:23,968 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 14 treesize of output 10 [2022-11-23 14:19:25,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:25,344 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-23 14:19:25,344 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 2 new quantified variables, introduced 4 case distinctions, treesize of input 507 treesize of output 507 [2022-11-23 14:19:25,532 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 14 treesize of output 10 [2022-11-23 14:19:25,556 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:25,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:25,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:25,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:25,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:25,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:25,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:25,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 475 treesize of output 394 [2022-11-23 14:19:25,593 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:25,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:25,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:25,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:25,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:25,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:25,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:25,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 415 treesize of output 350 [2022-11-23 14:19:25,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:19:25,747 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 14 treesize of output 10 [2022-11-23 14:19:25,765 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 14 treesize of output 10 [2022-11-23 14:19:26,998 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-23 14:19:26,998 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 45 treesize of output 49 [2022-11-23 14:19:27,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:19:27,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:27,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-11-23 14:19:27,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:27,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2022-11-23 14:19:27,170 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 14 treesize of output 10 [2022-11-23 14:19:27,185 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 14 treesize of output 10 [2022-11-23 14:19:27,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:19:27,266 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 14 treesize of output 10 [2022-11-23 14:19:27,283 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 14 treesize of output 10 [2022-11-23 14:19:27,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:19:28,669 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-23 14:19:28,669 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 45 treesize of output 49 [2022-11-23 14:19:28,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:28,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2022-11-23 14:19:28,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:28,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2022-11-23 14:19:28,764 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 14 treesize of output 10 [2022-11-23 14:19:28,859 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 14 treesize of output 10 [2022-11-23 14:19:28,877 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 14 treesize of output 10 [2022-11-23 14:19:28,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:19:28,951 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 14 treesize of output 10 [2022-11-23 14:19:28,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:19:28,983 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 14 treesize of output 10 [2022-11-23 14:19:29,912 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-23 14:19:29,913 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:19:37,505 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '169721#(and (= |~#list~0.offset| 0) (= (select |#valid| |~#list~0.base|) 1) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |ULTIMATE.start_main_~length~0#1| 0) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2022-11-23 14:19:37,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:19:37,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:19:37,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2022-11-23 14:19:37,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459765382] [2022-11-23 14:19:37,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:19:37,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 14:19:37,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:37,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 14:19:37,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1357, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:19:37,508 INFO L87 Difference]: Start difference. First operand 4047 states and 5510 transitions. Second operand has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:19:38,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:38,781 INFO L93 Difference]: Finished difference Result 5183 states and 7105 transitions. [2022-11-23 14:19:38,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:19:38,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 44 [2022-11-23 14:19:38,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:38,789 INFO L225 Difference]: With dead ends: 5183 [2022-11-23 14:19:38,790 INFO L226 Difference]: Without dead ends: 5179 [2022-11-23 14:19:38,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 95 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 817 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=312, Invalid=2138, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 14:19:38,792 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 439 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:38,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 728 Invalid, 886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:19:38,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5179 states. [2022-11-23 14:19:38,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5179 to 4062. [2022-11-23 14:19:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4062 states, 3707 states have (on average 1.3587806851901807) internal successors, (5037), 3789 states have internal predecessors, (5037), 243 states have call successors, (243), 87 states have call predecessors, (243), 87 states have return successors, (243), 185 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-23 14:19:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4062 states to 4062 states and 5523 transitions. [2022-11-23 14:19:38,864 INFO L78 Accepts]: Start accepts. Automaton has 4062 states and 5523 transitions. Word has length 44 [2022-11-23 14:19:38,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:38,865 INFO L495 AbstractCegarLoop]: Abstraction has 4062 states and 5523 transitions. [2022-11-23 14:19:38,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.857142857142857) internal successors, (110), 14 states have internal predecessors, (110), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 14:19:38,865 INFO L276 IsEmpty]: Start isEmpty. Operand 4062 states and 5523 transitions. [2022-11-23 14:19:38,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:19:38,866 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:38,867 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:38,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:39,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:39,073 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:19:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:39,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1025655379, now seen corresponding path program 1 times [2022-11-23 14:19:39,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:39,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692352270] [2022-11-23 14:19:39,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:39,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:19:39,345 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:39,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692352270] [2022-11-23 14:19:39,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692352270] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:19:39,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:19:39,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:19:39,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592324183] [2022-11-23 14:19:39,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:19:39,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:19:39,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:19:39,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:19:39,347 INFO L87 Difference]: Start difference. First operand 4062 states and 5523 transitions. Second operand has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:19:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:39,780 INFO L93 Difference]: Finished difference Result 5345 states and 7291 transitions. [2022-11-23 14:19:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:19:39,787 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2022-11-23 14:19:39,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:39,796 INFO L225 Difference]: With dead ends: 5345 [2022-11-23 14:19:39,796 INFO L226 Difference]: Without dead ends: 5345 [2022-11-23 14:19:39,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:19:39,799 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 633 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:39,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [633 Valid, 286 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:19:39,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5345 states. [2022-11-23 14:19:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5345 to 4061. [2022-11-23 14:19:39,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4061 states, 3707 states have (on average 1.3571621257081197) internal successors, (5031), 3788 states have internal predecessors, (5031), 243 states have call successors, (243), 87 states have call predecessors, (243), 87 states have return successors, (243), 185 states have call predecessors, (243), 243 states have call successors, (243) [2022-11-23 14:19:39,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4061 states to 4061 states and 5517 transitions. [2022-11-23 14:19:39,868 INFO L78 Accepts]: Start accepts. Automaton has 4061 states and 5517 transitions. Word has length 45 [2022-11-23 14:19:39,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:39,868 INFO L495 AbstractCegarLoop]: Abstraction has 4061 states and 5517 transitions. [2022-11-23 14:19:39,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.5) internal successors, (39), 7 states have internal predecessors, (39), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 14:19:39,868 INFO L276 IsEmpty]: Start isEmpty. Operand 4061 states and 5517 transitions. [2022-11-23 14:19:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:19:39,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:39,870 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-11-23 14:19:39,870 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:19:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:39,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1064260176, now seen corresponding path program 1 times [2022-11-23 14:19:39,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:39,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740321683] [2022-11-23 14:19:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:39,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:39,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:19:40,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:40,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740321683] [2022-11-23 14:19:40,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740321683] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:19:40,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:19:40,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-23 14:19:40,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692761629] [2022-11-23 14:19:40,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:19:40,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:19:40,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:40,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:19:40,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:19:40,688 INFO L87 Difference]: Start difference. First operand 4061 states and 5517 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:19:42,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:42,810 INFO L93 Difference]: Finished difference Result 4679 states and 6234 transitions. [2022-11-23 14:19:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 14:19:42,811 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-11-23 14:19:42,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:42,815 INFO L225 Difference]: With dead ends: 4679 [2022-11-23 14:19:42,816 INFO L226 Difference]: Without dead ends: 4679 [2022-11-23 14:19:42,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2022-11-23 14:19:42,816 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 830 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:42,816 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 860 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:19:42,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4679 states. [2022-11-23 14:19:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4679 to 3366. [2022-11-23 14:19:42,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3045 states have (on average 1.3566502463054186) internal successors, (4131), 3120 states have internal predecessors, (4131), 211 states have call successors, (211), 86 states have call predecessors, (211), 86 states have return successors, (211), 159 states have call predecessors, (211), 211 states have call successors, (211) [2022-11-23 14:19:42,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 4553 transitions. [2022-11-23 14:19:42,882 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 4553 transitions. Word has length 46 [2022-11-23 14:19:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:42,883 INFO L495 AbstractCegarLoop]: Abstraction has 3366 states and 4553 transitions. [2022-11-23 14:19:42,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 14:19:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 4553 transitions. [2022-11-23 14:19:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:19:42,884 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:42,884 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:19:42,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-11-23 14:19:42,885 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:19:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:42,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1210309745, now seen corresponding path program 1 times [2022-11-23 14:19:42,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:42,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174853142] [2022-11-23 14:19:42,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:42,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:43,072 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:19:43,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:43,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174853142] [2022-11-23 14:19:43,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174853142] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:19:43,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137165174] [2022-11-23 14:19:43,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:43,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:43,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:19:43,076 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:19:43,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 14:19:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:43,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 14:19:43,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:43,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:43,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:43,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 76 [2022-11-23 14:19:43,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:43,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:43,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 44 [2022-11-23 14:19:43,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:19:43,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:19:43,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137165174] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:19:43,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:19:43,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 13 [2022-11-23 14:19:43,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227102304] [2022-11-23 14:19:43,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:19:43,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:19:43,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:19:43,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:19:43,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-11-23 14:19:43,851 INFO L87 Difference]: Start difference. First operand 3366 states and 4553 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 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) [2022-11-23 14:19:44,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:19:44,786 INFO L93 Difference]: Finished difference Result 3010 states and 4053 transitions. [2022-11-23 14:19:44,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:19:44,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 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 47 [2022-11-23 14:19:44,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:19:44,791 INFO L225 Difference]: With dead ends: 3010 [2022-11-23 14:19:44,791 INFO L226 Difference]: Without dead ends: 3010 [2022-11-23 14:19:44,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:19:44,792 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 105 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:19:44,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 503 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:19:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3010 states. [2022-11-23 14:19:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3010 to 2949. [2022-11-23 14:19:44,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2669 states have (on average 1.3525665043087298) internal successors, (3610), 2734 states have internal predecessors, (3610), 185 states have call successors, (185), 71 states have call predecessors, (185), 71 states have return successors, (185), 143 states have call predecessors, (185), 185 states have call successors, (185) [2022-11-23 14:19:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 3980 transitions. [2022-11-23 14:19:44,832 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 3980 transitions. Word has length 47 [2022-11-23 14:19:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:19:44,832 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 3980 transitions. [2022-11-23 14:19:44,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 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) [2022-11-23 14:19:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 3980 transitions. [2022-11-23 14:19:44,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:19:44,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:19:44,833 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:19:44,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 14:19:45,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-11-23 14:19:45,040 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:19:45,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:19:45,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1123903815, now seen corresponding path program 1 times [2022-11-23 14:19:45,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:19:45,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329748814] [2022-11-23 14:19:45,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:45,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:19:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:19:47,548 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:19:47,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329748814] [2022-11-23 14:19:47,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329748814] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:19:47,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922389699] [2022-11-23 14:19:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:19:47,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:19:47,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:19:47,549 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:19:47,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 14:19:47,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:19:47,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-23 14:19:47,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:19:48,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:48,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 34 [2022-11-23 14:19:48,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:48,471 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 35 treesize of output 34 [2022-11-23 14:19:48,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:48,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:48,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:48,892 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:19:48,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 130 [2022-11-23 14:19:48,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:48,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:48,923 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:19:48,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 66 [2022-11-23 14:19:49,162 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:19:49,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:19:50,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:50,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:50,805 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:19:50,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 277 treesize of output 267 [2022-11-23 14:19:50,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:50,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:50,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:19:50,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 231 treesize of output 215 [2022-11-23 14:19:52,117 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:19:52,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922389699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:19:52,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1430728781] [2022-11-23 14:19:52,120 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-23 14:19:52,120 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:19:52,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:19:52,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:19:52,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:19:52,723 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:19:52,723 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 17 treesize of output 21 [2022-11-23 14:19:52,736 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 17 treesize of output 19 [2022-11-23 14:19:52,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:19:52,823 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 27 treesize of output 26 [2022-11-23 14:19:52,836 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 27 treesize of output 26 [2022-11-23 14:19:52,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:52,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:19:52,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:19:52,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:52,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:19:52,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:52,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:52,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:52,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:19:52,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:19:52,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:52,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:52,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:52,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:19:53,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:53,059 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:19:53,083 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 33 treesize of output 13 [2022-11-23 14:19:53,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:53,101 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:19:53,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:53,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:53,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:53,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-23 14:19:53,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:53,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:19:53,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:53,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 66 [2022-11-23 14:19:53,263 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 33 treesize of output 13 [2022-11-23 14:19:54,061 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:19:54,061 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:19:54,104 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:19:54,105 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 17 treesize of output 21 [2022-11-23 14:19:54,192 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 27 treesize of output 26 [2022-11-23 14:19:54,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:19:54,226 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 27 treesize of output 26 [2022-11-23 14:19:54,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:54,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:19:54,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:19:54,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:54,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:19:54,346 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 19 treesize of output 1 [2022-11-23 14:19:54,357 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 19 treesize of output 1 [2022-11-23 14:19:54,368 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 13 treesize of output 9 [2022-11-23 14:19:54,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:19:54,452 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:19:54,453 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 33 treesize of output 27 [2022-11-23 14:19:54,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:19:54,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:54,584 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2022-11-23 14:19:54,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:54,631 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:19:54,632 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:19:54,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:54,679 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:19:54,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:19:55,344 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:19:55,344 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:19:55,377 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:19:55,378 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 17 treesize of output 21 [2022-11-23 14:19:55,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:19:55,480 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 27 treesize of output 26 [2022-11-23 14:19:55,502 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 27 treesize of output 26 [2022-11-23 14:19:55,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:19:55,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:55,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:19:55,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:55,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:19:55,600 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 19 treesize of output 1 [2022-11-23 14:19:55,608 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 19 treesize of output 1 [2022-11-23 14:19:55,617 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 13 treesize of output 9 [2022-11-23 14:19:55,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:19:55,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:19:55,709 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:19:55,709 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 33 treesize of output 27 [2022-11-23 14:19:55,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:55,829 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:19:55,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:19:55,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:55,876 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:19:55,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:19:55,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:19:55,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2022-11-23 14:19:56,775 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:19:56,776 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 17 treesize of output 21 [2022-11-23 14:19:56,791 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 17 treesize of output 19 [2022-11-23 14:19:56,906 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 27 treesize of output 26 [2022-11-23 14:19:56,925 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 27 treesize of output 26 [2022-11-23 14:19:56,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:19:57,105 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 27 for LOIs [2022-11-23 14:19:57,110 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:20:09,005 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '203006#(and (<= 0 |#NULL.base|) (= |ULTIMATE.start_is_empty_~no_beg~0#1| (ite (and (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ |ULTIMATE.start_is_empty_~list#1.offset| (* ~unnamed1~0~LIST_BEG 4))) 0)) 1 0)) (= |ULTIMATE.start_is_empty_~list#1.base| |ULTIMATE.start_is_empty_#in~list#1.base|) (<= |ULTIMATE.start_main_~z~0#1| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_is_empty_~no_end~0#1| (ite (and (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_is_empty_~list#1.base|) (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset|)) 0)) 1 0)) (= 3 |~#list~0.base|) (<= 0 ~i~0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret27#1|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |#NULL.offset| 0) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (or (< 10 ~i~0) (not (= |ULTIMATE.start_is_empty_~no_end~0#1| |ULTIMATE.start_is_empty_~no_beg~0#1|))) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= (+ (* ~unnamed1~0~LIST_END 4) |ULTIMATE.start_is_empty_~list#1.offset| 4) (select |#length| |ULTIMATE.start_is_empty_~list#1.base|)) (<= |#NULL.base| 0) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 |~#list~0.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret27#1|) (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1) (<= 0 |#NULL.offset|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= 0 |#StackHeapBarrier|) (not (< |ULTIMATE.start_is_empty_~list#1.base| |#StackHeapBarrier|)) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|))' at error location [2022-11-23 14:20:09,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:20:09,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:20:09,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 16] total 47 [2022-11-23 14:20:09,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474687498] [2022-11-23 14:20:09,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:20:09,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-23 14:20:09,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:20:09,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-23 14:20:09,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=4883, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 14:20:09,008 INFO L87 Difference]: Start difference. First operand 2949 states and 3980 transitions. Second operand has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:21:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:21:33,155 INFO L93 Difference]: Finished difference Result 15782 states and 20954 transitions. [2022-11-23 14:21:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 309 states. [2022-11-23 14:21:33,156 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-11-23 14:21:33,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:21:33,176 INFO L225 Difference]: With dead ends: 15782 [2022-11-23 14:21:33,176 INFO L226 Difference]: Without dead ends: 15740 [2022-11-23 14:21:33,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 86 SyntacticMatches, 17 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55544 ImplicationChecksByTransitivity, 84.0s TimeCoverageRelationStatistics Valid=19074, Invalid=118938, Unknown=0, NotChecked=0, Total=138012 [2022-11-23 14:21:33,187 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 12541 mSDsluCounter, 5740 mSDsCounter, 0 mSdLazyCounter, 8909 mSolverCounterSat, 2028 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12545 SdHoareTripleChecker+Valid, 5974 SdHoareTripleChecker+Invalid, 10937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2028 IncrementalHoareTripleChecker+Valid, 8909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:21:33,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12545 Valid, 5974 Invalid, 10937 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2028 Valid, 8909 Invalid, 0 Unknown, 0 Unchecked, 13.6s Time] [2022-11-23 14:21:33,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15740 states. [2022-11-23 14:21:33,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15740 to 7634. [2022-11-23 14:21:33,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7634 states, 6946 states have (on average 1.3528649582493522) internal successors, (9397), 7085 states have internal predecessors, (9397), 485 states have call successors, (485), 179 states have call predecessors, (485), 179 states have return successors, (485), 369 states have call predecessors, (485), 485 states have call successors, (485) [2022-11-23 14:21:33,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7634 states to 7634 states and 10367 transitions. [2022-11-23 14:21:33,380 INFO L78 Accepts]: Start accepts. Automaton has 7634 states and 10367 transitions. Word has length 50 [2022-11-23 14:21:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:21:33,381 INFO L495 AbstractCegarLoop]: Abstraction has 7634 states and 10367 transitions. [2022-11-23 14:21:33,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 46 states have internal predecessors, (133), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:21:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 7634 states and 10367 transitions. [2022-11-23 14:21:33,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 14:21:33,382 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:33,383 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:21:33,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:21:33,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-23 14:21:33,589 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:21:33,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:33,589 INFO L85 PathProgramCache]: Analyzing trace with hash -622443914, now seen corresponding path program 1 times [2022-11-23 14:21:33,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:33,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340470253] [2022-11-23 14:21:33,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:33,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:21:35,424 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:35,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340470253] [2022-11-23 14:21:35,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340470253] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:21:35,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222520648] [2022-11-23 14:21:35,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:35,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:21:35,425 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:21:35,425 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:21:35,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 14:21:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-23 14:21:35,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:21:36,134 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 11 [2022-11-23 14:21:36,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:36,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-11-23 14:21:36,466 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 20 treesize of output 8 [2022-11-23 14:21:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:21:36,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:21:36,774 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 126 treesize of output 118 [2022-11-23 14:21:37,166 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:21:37,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222520648] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:21:37,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [883168792] [2022-11-23 14:21:37,167 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2022-11-23 14:21:37,167 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:21:37,168 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:21:37,168 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:21:37,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:21:37,772 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:21:37,773 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 17 treesize of output 21 [2022-11-23 14:21:37,784 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 17 treesize of output 19 [2022-11-23 14:21:37,911 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 27 treesize of output 26 [2022-11-23 14:21:37,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:21:37,939 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 27 treesize of output 26 [2022-11-23 14:21:37,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:37,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:21:37,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:37,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:21:38,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:21:38,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:21:38,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:21:38,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:21:38,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:21:38,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-23 14:21:38,205 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 33 treesize of output 13 [2022-11-23 14:21:38,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:21:38,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 74 [2022-11-23 14:21:38,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:21:38,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:38,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 66 [2022-11-23 14:21:38,367 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 33 treesize of output 13 [2022-11-23 14:21:39,383 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:21:39,383 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 17 treesize of output 21 [2022-11-23 14:21:39,426 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 17 treesize of output 19 [2022-11-23 14:21:39,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:21:39,535 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 27 treesize of output 26 [2022-11-23 14:21:39,551 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 27 treesize of output 26 [2022-11-23 14:21:39,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:39,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:21:39,671 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:21:39,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:39,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:21:39,760 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 19 treesize of output 1 [2022-11-23 14:21:39,769 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 19 treesize of output 1 [2022-11-23 14:21:39,781 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 13 treesize of output 9 [2022-11-23 14:21:39,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:21:39,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:21:39,875 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:21:39,876 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 33 treesize of output 27 [2022-11-23 14:21:39,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:39,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2022-11-23 14:21:40,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:40,027 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:21:40,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:21:40,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:40,077 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:21:40,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:21:40,794 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:21:40,794 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:21:40,827 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:21:40,828 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 17 treesize of output 21 [2022-11-23 14:21:40,961 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 27 treesize of output 26 [2022-11-23 14:21:40,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:21:40,995 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 27 treesize of output 26 [2022-11-23 14:21:41,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:41,026 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:21:41,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:41,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:21:41,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:21:41,097 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 13 treesize of output 9 [2022-11-23 14:21:41,107 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 19 treesize of output 1 [2022-11-23 14:21:41,117 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 19 treesize of output 1 [2022-11-23 14:21:41,182 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:21:41,182 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 33 treesize of output 27 [2022-11-23 14:21:41,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:21:41,212 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 11 [2022-11-23 14:21:41,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:41,332 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:21:41,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:21:41,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:41,369 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:21:41,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:21:41,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:41,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2022-11-23 14:21:42,217 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:21:42,217 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:21:42,259 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:21:42,260 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 17 treesize of output 21 [2022-11-23 14:21:42,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:21:42,383 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 27 treesize of output 26 [2022-11-23 14:21:42,397 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 27 treesize of output 26 [2022-11-23 14:21:42,425 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 18 for LOIs [2022-11-23 14:21:42,434 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:21:51,558 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '227402#(and (= |~#list~0.offset| 0) (= (select |#valid| |~#list~0.base|) 1) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1)) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:21:51,558 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:21:51,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:21:51,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-11-23 14:21:51,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731103013] [2022-11-23 14:21:51,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:21:51,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-11-23 14:21:51,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:21:51,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-11-23 14:21:51,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=3834, Unknown=0, NotChecked=0, Total=4160 [2022-11-23 14:21:51,560 INFO L87 Difference]: Start difference. First operand 7634 states and 10367 transitions. Second operand has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:21:56,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:21:56,369 INFO L93 Difference]: Finished difference Result 9155 states and 12518 transitions. [2022-11-23 14:21:56,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 14:21:56,370 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2022-11-23 14:21:56,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:21:56,382 INFO L225 Difference]: With dead ends: 9155 [2022-11-23 14:21:56,383 INFO L226 Difference]: Without dead ends: 9155 [2022-11-23 14:21:56,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 114 SyntacticMatches, 8 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=1113, Invalid=8199, Unknown=0, NotChecked=0, Total=9312 [2022-11-23 14:21:56,384 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 2118 mSDsluCounter, 1611 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2118 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 1998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:21:56,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2118 Valid, 1726 Invalid, 1998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 14:21:56,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9155 states. [2022-11-23 14:21:56,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9155 to 6555. [2022-11-23 14:21:56,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6555 states, 5977 states have (on average 1.3478333612180022) internal successors, (8056), 6089 states have internal predecessors, (8056), 409 states have call successors, (409), 145 states have call predecessors, (409), 145 states have return successors, (409), 320 states have call predecessors, (409), 409 states have call successors, (409) [2022-11-23 14:21:56,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6555 states to 6555 states and 8874 transitions. [2022-11-23 14:21:56,488 INFO L78 Accepts]: Start accepts. Automaton has 6555 states and 8874 transitions. Word has length 53 [2022-11-23 14:21:56,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:21:56,488 INFO L495 AbstractCegarLoop]: Abstraction has 6555 states and 8874 transitions. [2022-11-23 14:21:56,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 14:21:56,489 INFO L276 IsEmpty]: Start isEmpty. Operand 6555 states and 8874 transitions. [2022-11-23 14:21:56,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 14:21:56,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:21:56,490 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:21:56,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-11-23 14:21:56,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:21:56,696 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr51REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:21:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:21:56,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1099765272, now seen corresponding path program 1 times [2022-11-23 14:21:56,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:21:56,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747169730] [2022-11-23 14:21:56,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:56,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:21:56,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:21:59,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:21:59,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747169730] [2022-11-23 14:21:59,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747169730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:21:59,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171295033] [2022-11-23 14:21:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:21:59,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:21:59,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:21:59,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:21:59,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 14:21:59,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:21:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-23 14:21:59,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:21:59,516 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 14:21:59,517 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 [2022-11-23 14:21:59,781 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 11 [2022-11-23 14:21:59,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:21:59,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2022-11-23 14:22:00,333 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:22:00,334 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 17 treesize of output 21 [2022-11-23 14:22:00,512 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-23 14:22:00,625 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-23 14:22:00,743 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2022-11-23 14:22:00,949 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 14:22:00,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 56 [2022-11-23 14:22:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:01,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 35 [2022-11-23 14:22:01,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:01,722 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:22:01,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 46 [2022-11-23 14:22:01,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:22:01,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:22:03,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171295033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:22:03,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [387345406] [2022-11-23 14:22:03,623 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2022-11-23 14:22:03,624 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:22:03,624 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:22:03,624 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:22:03,624 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:22:04,210 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:22:04,210 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:22:04,248 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:22:04,248 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 17 treesize of output 21 [2022-11-23 14:22:04,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:22:04,332 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 27 treesize of output 26 [2022-11-23 14:22:04,348 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 27 treesize of output 26 [2022-11-23 14:22:04,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:22:04,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,404 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:22:04,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:22:04,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:22:04,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:22:04,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 43 [2022-11-23 14:22:04,595 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:22:04,595 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 1 case distinctions, treesize of input 33 treesize of output 27 [2022-11-23 14:22:04,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,685 INFO L321 Elim1Store]: treesize reduction 92, result has 38.7 percent of original size [2022-11-23 14:22:04,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 78 [2022-11-23 14:22:04,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:04,792 INFO L321 Elim1Store]: treesize reduction 100, result has 33.3 percent of original size [2022-11-23 14:22:04,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 70 [2022-11-23 14:22:04,878 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 14:22:04,913 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-23 14:22:04,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:04,987 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 23 treesize of output 1 [2022-11-23 14:22:04,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:05,051 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 23 treesize of output 1 [2022-11-23 14:22:05,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:05,102 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:22:05,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:22:05,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:05,140 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:22:05,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:22:05,901 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:22:05,901 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 17 treesize of output 21 [2022-11-23 14:22:05,915 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 17 treesize of output 19 [2022-11-23 14:22:06,023 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 27 treesize of output 26 [2022-11-23 14:22:06,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:22:06,053 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 27 treesize of output 26 [2022-11-23 14:22:06,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:06,102 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:22:06,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:06,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:22:06,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:22:06,258 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 19 treesize of output 1 [2022-11-23 14:22:06,270 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 19 treesize of output 1 [2022-11-23 14:22:06,280 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 13 treesize of output 9 [2022-11-23 14:22:06,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:06,359 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:22:06,359 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 33 treesize of output 27 [2022-11-23 14:22:06,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:06,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:06,442 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 23 treesize of output 1 [2022-11-23 14:22:06,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:06,524 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 23 treesize of output 1 [2022-11-23 14:22:06,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:06,577 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:22:06,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:22:06,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:06,614 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:22:06,614 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:22:07,282 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:22:07,283 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:22:07,329 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:22:07,329 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 17 treesize of output 21 [2022-11-23 14:22:07,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:22:07,415 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 27 treesize of output 26 [2022-11-23 14:22:07,436 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 27 treesize of output 26 [2022-11-23 14:22:07,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:22:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:07,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:22:07,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:07,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 40 [2022-11-23 14:22:07,532 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 13 treesize of output 9 [2022-11-23 14:22:07,545 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 19 treesize of output 1 [2022-11-23 14:22:07,557 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 19 treesize of output 1 [2022-11-23 14:22:07,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:07,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:07,642 INFO L321 Elim1Store]: treesize reduction 33, result has 41.1 percent of original size [2022-11-23 14:22:07,642 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 33 treesize of output 27 [2022-11-23 14:22:07,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:22:07,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:07,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:22:07,790 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 23 treesize of output 1 [2022-11-23 14:22:07,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:07,828 INFO L321 Elim1Store]: treesize reduction 53, result has 17.2 percent of original size [2022-11-23 14:22:07,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 57 [2022-11-23 14:22:07,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:22:07,876 INFO L321 Elim1Store]: treesize reduction 40, result has 37.5 percent of original size [2022-11-23 14:22:07,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 69 [2022-11-23 14:22:08,600 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:22:08,600 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 1 case distinctions, treesize of input 17 treesize of output 23 [2022-11-23 14:22:08,635 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:22:08,635 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 17 treesize of output 21 [2022-11-23 14:22:08,731 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-23 14:22:08,749 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 27 treesize of output 26 [2022-11-23 14:22:08,766 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 27 treesize of output 26 [2022-11-23 14:22:08,783 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 15 for LOIs [2022-11-23 14:22:08,785 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:22:17,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '243498#(and (= |~#list~0.offset| 0) (= (select |#valid| |~#list~0.base|) 1) (= (select (select |#memory_$Pointer$.offset| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.offset|) (= 3 |~#list~0.base|) (<= 0 ~i~0) (<= (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset| 4) (select |#length| |~#list~0.base|)) (< 0 |ULTIMATE.start_main_~length~0#1|) (not (= (select |#valid| |ULTIMATE.start_main_~cursor~0#1.base|) 1)) (= |ULTIMATE.start_main_~y~0#1| 0) (or (and (= ~unnamed2~0~ITEM_NEXT |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_~end_point~0#1|)) (and (= ~unnamed2~0~ITEM_PREV |ULTIMATE.start_main_~direction~0#1|) (= ~unnamed1~0~LIST_END |ULTIMATE.start_main_~end_point~0#1|))) (= |ULTIMATE.start_main_~z~0#1| 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_$Pointer$.base| |~#list~0.base|) (+ (* |ULTIMATE.start_main_~end_point~0#1| 4) |~#list~0.offset|)) |ULTIMATE.start_main_~cursor~0#1.base|) (= |#NULL.base| 0))' at error location [2022-11-23 14:22:17,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:22:17,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:22:17,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 40 [2022-11-23 14:22:17,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693949105] [2022-11-23 14:22:17,482 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:22:17,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 14:22:17,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:22:17,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 14:22:17,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=5351, Unknown=1, NotChecked=0, Total=5852 [2022-11-23 14:22:17,483 INFO L87 Difference]: Start difference. First operand 6555 states and 8874 transitions. Second operand has 41 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:22:25,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:22:25,572 INFO L93 Difference]: Finished difference Result 8792 states and 11666 transitions. [2022-11-23 14:22:25,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-11-23 14:22:25,572 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2022-11-23 14:22:25,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:22:25,581 INFO L225 Difference]: With dead ends: 8792 [2022-11-23 14:22:25,581 INFO L226 Difference]: Without dead ends: 8792 [2022-11-23 14:22:25,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5399 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=1924, Invalid=14845, Unknown=1, NotChecked=0, Total=16770 [2022-11-23 14:22:25,583 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 2860 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 2854 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2862 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 2854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:22:25,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2862 Valid, 1759 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 2854 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 14:22:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8792 states. [2022-11-23 14:22:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8792 to 6770. [2022-11-23 14:22:25,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6770 states, 6145 states have (on average 1.3345809601301872) internal successors, (8201), 6288 states have internal predecessors, (8201), 441 states have call successors, (441), 161 states have call predecessors, (441), 161 states have return successors, (441), 320 states have call predecessors, (441), 441 states have call successors, (441) [2022-11-23 14:22:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6770 states to 6770 states and 9083 transitions. [2022-11-23 14:22:25,680 INFO L78 Accepts]: Start accepts. Automaton has 6770 states and 9083 transitions. Word has length 54 [2022-11-23 14:22:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:22:25,681 INFO L495 AbstractCegarLoop]: Abstraction has 6770 states and 9083 transitions. [2022-11-23 14:22:25,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:22:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6770 states and 9083 transitions. [2022-11-23 14:22:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 14:22:25,683 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:22:25,683 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-11-23 14:22:25,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 14:22:25,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40c2aaec-4c69-4b6a-ae59-0f3b79091b2b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-11-23 14:22:25,894 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 54 more)] === [2022-11-23 14:22:25,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:22:25,894 INFO L85 PathProgramCache]: Analyzing trace with hash 312503794, now seen corresponding path program 1 times [2022-11-23 14:22:25,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:22:25,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536151229] [2022-11-23 14:22:25,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:22:25,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:22:25,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat