./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7 --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 bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 19:58:45,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 19:58:45,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 19:58:45,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 19:58:45,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 19:58:45,856 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 19:58:45,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 19:58:45,860 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 19:58:45,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 19:58:45,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 19:58:45,865 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 19:58:45,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 19:58:45,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 19:58:45,868 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 19:58:45,870 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 19:58:45,871 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 19:58:45,872 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 19:58:45,874 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 19:58:45,876 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 19:58:45,879 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 19:58:45,881 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 19:58:45,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 19:58:45,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 19:58:45,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 19:58:45,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 19:58:45,890 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 19:58:45,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 19:58:45,892 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 19:58:45,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 19:58:45,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 19:58:45,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 19:58:45,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 19:58:45,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 19:58:45,896 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 19:58:45,898 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 19:58:45,898 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 19:58:45,899 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 19:58:45,899 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 19:58:45,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 19:58:45,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 19:58:45,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 19:58:45,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-25 19:58:45,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 19:58:45,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 19:58:45,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 19:58:45,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 19:58:45,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 19:58:45,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 19:58:45,931 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 19:58:45,932 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 19:58:45,932 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 19:58:45,932 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 19:58:45,933 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 19:58:45,933 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 19:58:45,934 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 19:58:45,934 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 19:58:45,934 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 19:58:45,935 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 19:58:45,935 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 19:58:45,935 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 19:58:45,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-25 19:58:45,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-25 19:58:45,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 19:58:45,937 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 19:58:45,938 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-25 19:58:45,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 19:58:45,939 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 19:58:45,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 19:58:45,939 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-25 19:58:45,940 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-25 19:58:45,940 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-25 19:58:45,940 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 19:58:45,941 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-25 19:58:45,941 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 19:58:45,942 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 19:58:45,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 19:58:45,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 19:58:45,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:58:45,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 19:58:45,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 19:58:45,944 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 19:58:45,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 19:58:45,945 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 19:58:45,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 19:58:45,945 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bae9bfc842bb010963d083e19e9498cfd3af182f91f0b8fa56907786a4d462dd [2021-11-25 19:58:46,199 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 19:58:46,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 19:58:46,235 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 19:58:46,237 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 19:58:46,237 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 19:58:46,239 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-11-25 19:58:46,297 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/data/6ddeb2ec2/ea34c059da7d4ea89bd3c3c5cbf78fe1/FLAG2f08d51c8 [2021-11-25 19:58:46,800 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 19:58:46,800 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-11-25 19:58:46,814 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/data/6ddeb2ec2/ea34c059da7d4ea89bd3c3c5cbf78fe1/FLAG2f08d51c8 [2021-11-25 19:58:47,271 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/data/6ddeb2ec2/ea34c059da7d4ea89bd3c3c5cbf78fe1 [2021-11-25 19:58:47,273 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 19:58:47,276 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 19:58:47,278 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 19:58:47,279 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 19:58:47,282 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 19:58:47,283 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@680ffe62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47, skipping insertion in model container [2021-11-25 19:58:47,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 19:58:47,330 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 19:58:47,666 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-11-25 19:58:47,669 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:58:47,688 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 19:58:47,752 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-11-25 19:58:47,753 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 19:58:47,781 INFO L208 MainTranslator]: Completed translation [2021-11-25 19:58:47,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47 WrapperNode [2021-11-25 19:58:47,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 19:58:47,783 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 19:58:47,783 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 19:58:47,784 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 19:58:47,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,828 INFO L137 Inliner]: procedures = 126, calls = 25, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 86 [2021-11-25 19:58:47,828 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 19:58:47,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 19:58:47,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 19:58:47,829 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 19:58:47,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,849 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,868 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 19:58:47,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 19:58:47,869 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 19:58:47,869 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 19:58:47,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (1/1) ... [2021-11-25 19:58:47,889 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 19:58:47,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:47,913 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 19:58:47,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 19:58:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 19:58:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 19:58:47,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 19:58:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 19:58:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 19:58:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 19:58:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 19:58:47,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 19:58:47,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 19:58:47,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 19:58:47,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 19:58:48,105 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 19:58:48,107 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 19:58:48,348 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 19:58:48,383 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 19:58:48,383 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-25 19:58:48,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:58:48 BoogieIcfgContainer [2021-11-25 19:58:48,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 19:58:48,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 19:58:48,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 19:58:48,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 19:58:48,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 07:58:47" (1/3) ... [2021-11-25 19:58:48,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dca916e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:58:48, skipping insertion in model container [2021-11-25 19:58:48,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 07:58:47" (2/3) ... [2021-11-25 19:58:48,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dca916e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 07:58:48, skipping insertion in model container [2021-11-25 19:58:48,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 07:58:48" (3/3) ... [2021-11-25 19:58:48,394 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2021-11-25 19:58:48,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 19:58:48,404 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-11-25 19:58:48,468 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 19:58:48,475 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-25 19:58:48,476 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-11-25 19:58:48,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:58:48,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:48,497 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:58:48,498 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:58:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:48,503 INFO L85 PathProgramCache]: Analyzing trace with hash 3883661, now seen corresponding path program 1 times [2021-11-25 19:58:48,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:48,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317660765] [2021-11-25 19:58:48,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:48,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:48,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:48,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317660765] [2021-11-25 19:58:48,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317660765] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:48,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:48,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:58:48,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285073540] [2021-11-25 19:58:48,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:48,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:58:48,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:48,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:58:48,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:58:48,797 INFO L87 Difference]: Start difference. First operand has 41 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) 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) [2021-11-25 19:58:48,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:48,842 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-11-25 19:58:48,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:58:48,844 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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 [2021-11-25 19:58:48,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:48,853 INFO L225 Difference]: With dead ends: 53 [2021-11-25 19:58:48,853 INFO L226 Difference]: Without dead ends: 50 [2021-11-25 19:58:48,855 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:58:48,859 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:48,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 68 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:48,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-25 19:58:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2021-11-25 19:58:48,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:48,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-25 19:58:48,895 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 4 [2021-11-25 19:58:48,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:48,896 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-25 19:58:48,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) 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) [2021-11-25 19:58:48,896 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-25 19:58:48,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:58:48,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:48,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:58:48,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 19:58:48,898 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:58:48,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:48,899 INFO L85 PathProgramCache]: Analyzing trace with hash 3793582, now seen corresponding path program 1 times [2021-11-25 19:58:48,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:48,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926222139] [2021-11-25 19:58:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:48,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:48,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:48,942 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:48,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926222139] [2021-11-25 19:58:48,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926222139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:48,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:48,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:58:48,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639893252] [2021-11-25 19:58:48,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:48,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:58:48,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:48,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:58:48,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:58:48,947 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2021-11-25 19:58:49,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:49,006 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-25 19:58:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:58:49,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 [2021-11-25 19:58:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:49,008 INFO L225 Difference]: With dead ends: 60 [2021-11-25 19:58:49,008 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 19:58:49,009 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:58:49,011 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:49,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 28 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:58:49,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 19:58:49,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 38. [2021-11-25 19:58:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-11-25 19:58:49,018 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 4 [2021-11-25 19:58:49,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:49,019 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-11-25 19:58:49,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,019 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-11-25 19:58:49,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-25 19:58:49,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:49,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-25 19:58:49,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 19:58:49,021 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:58:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:49,021 INFO L85 PathProgramCache]: Analyzing trace with hash 3793583, now seen corresponding path program 1 times [2021-11-25 19:58:49,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:49,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542345174] [2021-11-25 19:58:49,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:49,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:49,091 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:49,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542345174] [2021-11-25 19:58:49,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542345174] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:49,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:49,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 19:58:49,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527039134] [2021-11-25 19:58:49,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:49,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 19:58:49,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:49,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 19:58:49,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 19:58:49,098 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 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) [2021-11-25 19:58:49,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:49,146 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-25 19:58:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 19:58:49,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 [2021-11-25 19:58:49,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:49,148 INFO L225 Difference]: With dead ends: 36 [2021-11-25 19:58:49,148 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 19:58:49,148 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:58:49,150 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:49,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:49,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 19:58:49,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-25 19:58:49,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-25 19:58:49,157 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 4 [2021-11-25 19:58:49,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:49,157 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-25 19:58:49,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,158 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-25 19:58:49,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:58:49,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:49,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:58:49,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 19:58:49,159 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:58:49,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:49,160 INFO L85 PathProgramCache]: Analyzing trace with hash -649332982, now seen corresponding path program 1 times [2021-11-25 19:58:49,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:49,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403644118] [2021-11-25 19:58:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:49,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:49,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:49,217 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:49,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403644118] [2021-11-25 19:58:49,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403644118] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:49,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:49,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:58:49,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272194634] [2021-11-25 19:58:49,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:49,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:49,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:49,220 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:49,296 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-11-25 19:58:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:49,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-11-25 19:58:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:49,303 INFO L225 Difference]: With dead ends: 60 [2021-11-25 19:58:49,303 INFO L226 Difference]: Without dead ends: 60 [2021-11-25 19:58:49,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:58:49,305 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:49,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 39 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:58:49,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-25 19:58:49,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 35. [2021-11-25 19:58:49,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 19 states have (on average 1.894736842105263) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-25 19:58:49,321 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 6 [2021-11-25 19:58:49,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:49,322 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-25 19:58:49,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,322 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-25 19:58:49,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-25 19:58:49,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:49,324 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-25 19:58:49,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 19:58:49,324 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:58:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash -649332981, now seen corresponding path program 1 times [2021-11-25 19:58:49,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:49,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001450520] [2021-11-25 19:58:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:49,327 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:49,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:49,437 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:49,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001450520] [2021-11-25 19:58:49,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001450520] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:49,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:58:49,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:58:49,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168545649] [2021-11-25 19:58:49,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:49,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:58:49,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:49,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:58:49,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:58:49,443 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:49,522 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-25 19:58:49,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:58:49,523 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 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 6 [2021-11-25 19:58:49,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:49,524 INFO L225 Difference]: With dead ends: 37 [2021-11-25 19:58:49,524 INFO L226 Difference]: Without dead ends: 37 [2021-11-25 19:58:49,524 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:58:49,530 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 61 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:49,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:58:49,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-25 19:58:49,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2021-11-25 19:58:49,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-25 19:58:49,535 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 6 [2021-11-25 19:58:49,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:49,535 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-25 19:58:49,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:49,536 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-25 19:58:49,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:58:49,536 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:49,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:49,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 19:58:49,537 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:58:49,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:49,537 INFO L85 PathProgramCache]: Analyzing trace with hash 255990205, now seen corresponding path program 1 times [2021-11-25 19:58:49,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:49,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505052588] [2021-11-25 19:58:49,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:49,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:49,642 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:49,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505052588] [2021-11-25 19:58:49,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505052588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:49,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780426490] [2021-11-25 19:58:49,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:49,643 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:49,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:49,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:49,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 19:58:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:49,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:58:49,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:49,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:49,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:49,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780426490] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:58:49,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2109393136] [2021-11-25 19:58:49,926 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:58:49,926 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:58:49,932 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:58:49,937 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:58:49,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:58:50,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 19:58:50,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 19:58:50,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-25 19:58:50,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 19:58:50,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:58:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 19:58:50,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 19:58:50,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 19:58:50,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 31 [2021-11-25 19:58:50,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:50,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:58:50,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:50,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:58:50,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 19:58:50,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:50,758 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:58:50,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2021-11-25 19:58:50,819 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:58:50,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2021-11-25 19:58:50,875 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:58:50,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2021-11-25 19:58:51,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:51,420 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:58:51,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 672 treesize of output 673 [2021-11-25 19:58:51,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:51,501 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:58:51,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 666 treesize of output 667 [2021-11-25 19:58:51,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:51,588 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:58:51,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 647 treesize of output 628 [2021-11-25 19:58:52,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:52,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:52,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:52,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:52,436 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 19:58:52,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 352 treesize of output 337 [2021-11-25 19:58:52,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:52,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:52,485 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:58:52,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 348 treesize of output 341 [2021-11-25 19:58:52,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:52,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:52,530 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:58:52,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 360 treesize of output 353 [2021-11-25 19:58:52,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:52,758 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 19:58:52,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 415 treesize of output 419 [2021-11-25 19:58:53,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:53,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:53,058 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:58:53,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2021-11-25 19:58:53,111 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:58:53,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2021-11-25 19:58:53,170 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:58:53,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2021-11-25 19:58:53,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:53,413 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:58:53,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 366 treesize of output 367 [2021-11-25 19:58:53,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:53,493 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:58:53,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 348 [2021-11-25 19:58:53,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:53,557 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:58:53,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 356 treesize of output 357 [2021-11-25 19:58:54,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:54,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:54,075 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:58:54,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 356 treesize of output 349 [2021-11-25 19:58:54,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:54,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:54,114 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:58:54,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 368 treesize of output 361 [2021-11-25 19:58:54,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:54,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:54,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:54,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:54,146 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 19:58:54,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 450 treesize of output 435 [2021-11-25 19:58:54,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:58:54,337 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:58:54,344 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:58:56,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [2109393136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:58:56,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:58:56,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 10 [2021-11-25 19:58:56,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204343858] [2021-11-25 19:58:56,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:58:56,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:58:56,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:58:56,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:58:56,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:58:56,888 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:57,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:58:57,156 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-11-25 19:58:57,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:58:57,156 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 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 9 [2021-11-25 19:58:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:58:57,157 INFO L225 Difference]: With dead ends: 53 [2021-11-25 19:58:57,157 INFO L226 Difference]: Without dead ends: 53 [2021-11-25 19:58:57,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-25 19:58:57,158 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 47 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:58:57,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 43 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 19:58:57,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-11-25 19:58:57,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 35. [2021-11-25 19:58:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 20 states have (on average 1.8) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:57,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-11-25 19:58:57,163 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 9 [2021-11-25 19:58:57,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:58:57,164 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-11-25 19:58:57,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:58:57,164 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-11-25 19:58:57,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-25 19:58:57,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:58:57,164 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:58:57,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 19:58:57,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:57,381 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:58:57,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:58:57,381 INFO L85 PathProgramCache]: Analyzing trace with hash 255988536, now seen corresponding path program 1 times [2021-11-25 19:58:57,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:58:57,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491420189] [2021-11-25 19:58:57,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:57,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:58:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:57,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:58:57,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491420189] [2021-11-25 19:58:57,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491420189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:58:57,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535426644] [2021-11-25 19:58:57,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:58:57,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:58:57,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:58:57,453 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:58:57,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 19:58:57,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:58:57,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-25 19:58:57,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:58:57,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:57,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:58:57,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:58:57,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535426644] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:58:57,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1588535587] [2021-11-25 19:58:57,633 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:58:57,633 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:58:57,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:58:57,634 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:58:57,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:58:57,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 19:58:57,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 19:58:57,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:58:57,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 19:58:57,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:58:57,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 19:58:57,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 19:58:57,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 19:58:57,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 31 [2021-11-25 19:58:57,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:57,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:58:57,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:57,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:58:57,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:57,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:58,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:58,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 19:58:58,134 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:58:58,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2021-11-25 19:58:58,180 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:58:58,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2021-11-25 19:58:58,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:58,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:58,208 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:58:58,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 333 treesize of output 315 [2021-11-25 19:58:58,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:58,443 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:58:58,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 353 treesize of output 354 [2021-11-25 19:58:58,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:58,513 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:58:58,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 362 treesize of output 363 [2021-11-25 19:58:58,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:58,574 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:58:58,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 356 treesize of output 357 [2021-11-25 19:58:58,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:58,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:58,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:58,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:58,961 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 19:58:58,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 360 treesize of output 345 [2021-11-25 19:58:59,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:59,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:59,014 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:58:59,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 356 treesize of output 349 [2021-11-25 19:58:59,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:59,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:58:59,047 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 19:58:59,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 434 treesize of output 427 [2021-11-25 19:58:59,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:59,245 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 19:58:59,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 435 treesize of output 439 [2021-11-25 19:58:59,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:59,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:59,507 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:58:59,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2021-11-25 19:58:59,550 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:58:59,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2021-11-25 19:58:59,601 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:58:59,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2021-11-25 19:58:59,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:58:59,982 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:58:59,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 853 treesize of output 848 [2021-11-25 19:59:00,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:00,039 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:00,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 841 treesize of output 842 [2021-11-25 19:59:00,067 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:00,099 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:59:00,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 822 treesize of output 791 [2021-11-25 19:59:00,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:00,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:00,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:00,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:00,623 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 19:59:00,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2021-11-25 19:59:00,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:00,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:00,665 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:59:00,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 352 treesize of output 345 [2021-11-25 19:59:00,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:00,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:00,697 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:59:00,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 364 treesize of output 357 [2021-11-25 19:59:00,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:59:00,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:59:00,850 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:03,217 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '695#(and (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:03,217 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:03,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:03,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2021-11-25 19:59:03,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938809249] [2021-11-25 19:59:03,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:03,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:59:03,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:03,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:59:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:59:03,219 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:03,252 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-25 19:59:03,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 19:59:03,253 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 9 [2021-11-25 19:59:03,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:03,254 INFO L225 Difference]: With dead ends: 40 [2021-11-25 19:59:03,254 INFO L226 Difference]: Without dead ends: 40 [2021-11-25 19:59:03,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:59:03,255 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:03,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 76 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:03,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-25 19:59:03,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-25 19:59:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.64) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-25 19:59:03,260 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 9 [2021-11-25 19:59:03,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:03,260 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-25 19:59:03,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:03,260 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-25 19:59:03,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:59:03,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:03,261 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 19:59:03,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-25 19:59:03,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-25 19:59:03,477 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:03,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:03,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1479394808, now seen corresponding path program 2 times [2021-11-25 19:59:03,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:03,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628040681] [2021-11-25 19:59:03,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:03,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:03,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-25 19:59:03,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:03,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628040681] [2021-11-25 19:59:03,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628040681] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:03,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425683572] [2021-11-25 19:59:03,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 19:59:03,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:03,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:03,618 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:03,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 19:59:03,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 19:59:03,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 19:59:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-25 19:59:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:03,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:59:03,747 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-25 19:59:03,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:59:03,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:03,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:59:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:59:03,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:05,949 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_node_create_~temp~0#1.base_23| Int) (|v_ULTIMATE.start_node_create_~temp~0#1.base_22| Int) (v_ArrVal_217 Int)) (or (<= |c_#StackHeapBarrier| |v_ULTIMATE.start_node_create_~temp~0#1.base_22|) (= (select (store (store |c_#valid| |v_ULTIMATE.start_node_create_~temp~0#1.base_23| 1) |v_ULTIMATE.start_node_create_~temp~0#1.base_22| v_ArrVal_217) |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) is different from false [2021-11-25 19:59:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-25 19:59:05,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425683572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:05,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21681435] [2021-11-25 19:59:05,956 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:59:05,956 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:05,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:05,956 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:05,956 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:05,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:05,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:05,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 19:59:06,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 19:59:06,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 19:59:06,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-25 19:59:06,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:59:06,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 19:59:06,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 19:59:06,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 19:59:06,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:06,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:59:06,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 31 [2021-11-25 19:59:06,211 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:06,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:59:06,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 19:59:06,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,408 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 19:59:06,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 352 treesize of output 344 [2021-11-25 19:59:06,459 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:06,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 349 [2021-11-25 19:59:06,508 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:06,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 343 [2021-11-25 19:59:06,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:06,960 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:06,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 707 treesize of output 702 [2021-11-25 19:59:06,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:07,050 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 19:59:07,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 682 treesize of output 671 [2021-11-25 19:59:07,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:07,113 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:07,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 691 treesize of output 686 [2021-11-25 19:59:07,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:07,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:07,702 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:59:07,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 501 treesize of output 494 [2021-11-25 19:59:07,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:07,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:07,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:07,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:07,736 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 19:59:07,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 589 treesize of output 566 [2021-11-25 19:59:07,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:07,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:07,775 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 19:59:07,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 585 treesize of output 578 [2021-11-25 19:59:07,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:07,987 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 19:59:07,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 435 treesize of output 439 [2021-11-25 19:59:08,272 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:08,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2021-11-25 19:59:08,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:08,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:08,332 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 19:59:08,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 346 treesize of output 338 [2021-11-25 19:59:08,382 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:08,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 343 [2021-11-25 19:59:08,955 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:09,007 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 19:59:09,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1517 treesize of output 1454 [2021-11-25 19:59:09,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:09,085 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:09,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1514 treesize of output 1503 [2021-11-25 19:59:09,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:09,175 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:09,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1496 treesize of output 1485 [2021-11-25 19:59:10,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:10,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:10,407 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 19:59:10,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 643 treesize of output 636 [2021-11-25 19:59:10,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:10,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:10,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:10,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:10,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:10,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:10,445 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 19:59:10,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 695 treesize of output 664 [2021-11-25 19:59:10,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:10,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:10,488 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 19:59:10,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 691 treesize of output 684 [2021-11-25 19:59:10,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:59:10,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:59:10,672 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:13,407 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '871#(and (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:13,407 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:13,407 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:13,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 4] total 8 [2021-11-25 19:59:13,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969353845] [2021-11-25 19:59:13,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:13,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-25 19:59:13,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:13,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-25 19:59:13,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=198, Unknown=1, NotChecked=30, Total=306 [2021-11-25 19:59:13,409 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:13,579 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2021-11-25 19:59:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:59:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 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 14 [2021-11-25 19:59:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:13,581 INFO L225 Difference]: With dead ends: 52 [2021-11-25 19:59:13,581 INFO L226 Difference]: Without dead ends: 52 [2021-11-25 19:59:13,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=105, Invalid=278, Unknown=1, NotChecked=36, Total=420 [2021-11-25 19:59:13,582 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:13,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 32 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 75 Invalid, 0 Unknown, 36 Unchecked, 0.1s Time] [2021-11-25 19:59:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-25 19:59:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2021-11-25 19:59:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-11-25 19:59:13,587 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 14 [2021-11-25 19:59:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:13,587 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-11-25 19:59:13,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-11-25 19:59:13,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-25 19:59:13,588 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:13,589 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2021-11-25 19:59:13,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:13,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 19:59:13,789 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:13,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:13,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1479394807, now seen corresponding path program 1 times [2021-11-25 19:59:13,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:13,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220947534] [2021-11-25 19:59:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:13,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:13,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:13,981 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:13,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220947534] [2021-11-25 19:59:13,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220947534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:13,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350140273] [2021-11-25 19:59:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:13,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:13,985 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:14,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 19:59:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:14,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-25 19:59:14,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:14,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:59:14,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:59:14,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:59:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:59:14,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:59:14,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350140273] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:14,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [189532407] [2021-11-25 19:59:14,696 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-25 19:59:14,696 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:14,696 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:14,696 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:14,696 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:14,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 19:59:14,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 19:59:14,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:59:14,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 19:59:14,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-25 19:59:14,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 19:59:14,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 19:59:14,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 19:59:14,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:14,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:59:14,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:14,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:59:14,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 31 [2021-11-25 19:59:14,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 19:59:15,131 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:15,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2021-11-25 19:59:15,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:15,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:15,156 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:59:15,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 339 treesize of output 321 [2021-11-25 19:59:15,209 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:15,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2021-11-25 19:59:15,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:15,411 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:59:15,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 353 treesize of output 354 [2021-11-25 19:59:15,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:15,477 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:15,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 362 treesize of output 363 [2021-11-25 19:59:15,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:15,524 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:15,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 356 treesize of output 357 [2021-11-25 19:59:15,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:15,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:15,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:15,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:15,922 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 19:59:15,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 360 treesize of output 345 [2021-11-25 19:59:15,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:15,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:15,966 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:59:15,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 356 treesize of output 349 [2021-11-25 19:59:15,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:15,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:16,004 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 19:59:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 434 treesize of output 427 [2021-11-25 19:59:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:16,195 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 19:59:16,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 435 treesize of output 439 [2021-11-25 19:59:16,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:16,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:16,438 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:59:16,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 345 treesize of output 327 [2021-11-25 19:59:16,476 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:16,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2021-11-25 19:59:16,515 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:16,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 333 treesize of output 340 [2021-11-25 19:59:16,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:16,715 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:16,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 366 treesize of output 367 [2021-11-25 19:59:16,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:16,777 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 19:59:16,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 348 [2021-11-25 19:59:16,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:16,830 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:16,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 356 treesize of output 357 [2021-11-25 19:59:17,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:17,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:17,246 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 19:59:17,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 368 treesize of output 361 [2021-11-25 19:59:17,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:17,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:17,290 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 19:59:17,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 446 treesize of output 439 [2021-11-25 19:59:17,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:17,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:17,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:17,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:17,323 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 19:59:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 486 treesize of output 471 [2021-11-25 19:59:17,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:59:17,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:59:17,505 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:20,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1071#(and (= |ULTIMATE.start_sll_create_~head~0#1.base| |ULTIMATE.start_sll_create_#res#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start_sll_remove_first_#in~head#1.base| |ULTIMATE.start_main_~#s~0#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (< (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|) (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4)) (= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| |ULTIMATE.start_main_~#s~0#1.offset|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_sll_remove_first_~head#1.offset| |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_sll_create_#res#1.offset| |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= 0 |#NULL.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_main_~#s~0#1.base|) |ULTIMATE.start_main_~#s~0#1.offset|) |ULTIMATE.start_sll_create_#res#1.base|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (= |ULTIMATE.start_main_~len~0#1| (+ |ULTIMATE.start_main_~i~0#1| 1)) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:20,077 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:20,078 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:20,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 3, 3] total 12 [2021-11-25 19:59:20,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228768510] [2021-11-25 19:59:20,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:20,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-25 19:59:20,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:20,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-25 19:59:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2021-11-25 19:59:20,080 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:20,217 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-25 19:59:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:59:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-25 19:59:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:20,218 INFO L225 Difference]: With dead ends: 46 [2021-11-25 19:59:20,218 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 19:59:20,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=156, Invalid=444, Unknown=0, NotChecked=0, Total=600 [2021-11-25 19:59:20,219 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 83 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:20,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 11 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2021-11-25 19:59:20,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 19:59:20,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2021-11-25 19:59:20,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-25 19:59:20,222 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 14 [2021-11-25 19:59:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:20,223 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-25 19:59:20,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.230769230769231) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-25 19:59:20,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:59:20,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:20,223 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:59:20,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:20,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:20,424 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:20,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1383401228, now seen corresponding path program 1 times [2021-11-25 19:59:20,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:20,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093088438] [2021-11-25 19:59:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:20,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:20,490 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-25 19:59:20,491 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:20,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093088438] [2021-11-25 19:59:20,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093088438] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:20,491 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:20,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 19:59:20,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182384371] [2021-11-25 19:59:20,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:20,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 19:59:20,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:20,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 19:59:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:59:20,493 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:20,600 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-11-25 19:59:20,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 19:59:20,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 19:59:20,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:20,604 INFO L225 Difference]: With dead ends: 45 [2021-11-25 19:59:20,604 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 19:59:20,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-25 19:59:20,605 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 31 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:20,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 52 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:20,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 19:59:20,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 37. [2021-11-25 19:59:20,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-11-25 19:59:20,609 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 15 [2021-11-25 19:59:20,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:20,610 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-11-25 19:59:20,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,610 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-11-25 19:59:20,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-25 19:59:20,611 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:20,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-25 19:59:20,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 19:59:20,611 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:20,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:20,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1383401229, now seen corresponding path program 1 times [2021-11-25 19:59:20,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:20,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640852732] [2021-11-25 19:59:20,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:20,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:59:20,719 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:20,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640852732] [2021-11-25 19:59:20,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640852732] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:20,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:20,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:59:20,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216837715] [2021-11-25 19:59:20,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:20,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:59:20,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:59:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:59:20,721 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:20,893 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2021-11-25 19:59:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 19:59:20,894 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-25 19:59:20,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:20,894 INFO L225 Difference]: With dead ends: 46 [2021-11-25 19:59:20,894 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 19:59:20,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-11-25 19:59:20,895 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 125 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:20,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 50 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 19:59:20,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-11-25 19:59:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-11-25 19:59:20,900 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 15 [2021-11-25 19:59:20,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:20,900 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-11-25 19:59:20,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:20,900 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-11-25 19:59:20,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-25 19:59:20,901 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:20,901 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:20,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-25 19:59:20,902 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:20,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:20,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1991243403, now seen corresponding path program 1 times [2021-11-25 19:59:20,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:20,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582609552] [2021-11-25 19:59:20,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:20,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:59:20,984 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:20,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582609552] [2021-11-25 19:59:20,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582609552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:20,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:20,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:59:20,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32483271] [2021-11-25 19:59:20,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:20,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:59:20,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:59:20,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:59:20,989 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:21,121 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-11-25 19:59:21,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:59:21,121 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-25 19:59:21,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:21,122 INFO L225 Difference]: With dead ends: 45 [2021-11-25 19:59:21,122 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 19:59:21,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:59:21,123 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 131 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:21,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 58 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 19:59:21,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2021-11-25 19:59:21,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-25 19:59:21,126 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 17 [2021-11-25 19:59:21,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:21,127 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-25 19:59:21,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,127 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-25 19:59:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-25 19:59:21,128 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:21,128 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:21,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 19:59:21,128 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:21,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:21,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1599003259, now seen corresponding path program 1 times [2021-11-25 19:59:21,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:21,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975896514] [2021-11-25 19:59:21,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:21,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:59:21,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:21,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975896514] [2021-11-25 19:59:21,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975896514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:21,245 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:21,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-25 19:59:21,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331218550] [2021-11-25 19:59:21,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:21,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 19:59:21,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:21,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 19:59:21,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-25 19:59:21,247 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:21,399 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-25 19:59:21,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-25 19:59:21,399 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-25 19:59:21,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:21,400 INFO L225 Difference]: With dead ends: 44 [2021-11-25 19:59:21,400 INFO L226 Difference]: Without dead ends: 44 [2021-11-25 19:59:21,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:59:21,401 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:21,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 40 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 19:59:21,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-25 19:59:21,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2021-11-25 19:59:21,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-25 19:59:21,405 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 18 [2021-11-25 19:59:21,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:21,405 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-25 19:59:21,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-25 19:59:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-25 19:59:21,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:21,406 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:21,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 19:59:21,407 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1970506615, now seen corresponding path program 1 times [2021-11-25 19:59:21,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:21,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895749555] [2021-11-25 19:59:21,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:21,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:21,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:59:21,454 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:21,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895749555] [2021-11-25 19:59:21,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895749555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:21,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:21,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 19:59:21,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103300714] [2021-11-25 19:59:21,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:21,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 19:59:21,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 19:59:21,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 19:59:21,456 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:21,512 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-11-25 19:59:21,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:21,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 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 19 [2021-11-25 19:59:21,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:21,514 INFO L225 Difference]: With dead ends: 39 [2021-11-25 19:59:21,514 INFO L226 Difference]: Without dead ends: 39 [2021-11-25 19:59:21,514 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 19:59:21,515 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:21,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 30 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:21,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-25 19:59:21,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-25 19:59:21,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-11-25 19:59:21,518 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 19 [2021-11-25 19:59:21,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:21,519 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-11-25 19:59:21,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,519 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-11-25 19:59:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-25 19:59:21,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:21,520 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:21,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 19:59:21,520 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:21,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash 956163016, now seen corresponding path program 1 times [2021-11-25 19:59:21,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:21,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835050607] [2021-11-25 19:59:21,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:21,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-25 19:59:21,635 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:21,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835050607] [2021-11-25 19:59:21,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835050607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:21,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117213789] [2021-11-25 19:59:21,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:21,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:21,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:21,636 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:21,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 19:59:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:21,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 19:59:21,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:21,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:21,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-11-25 19:59:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:59:21,858 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 19:59:21,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117213789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:21,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 19:59:21,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-25 19:59:21,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86534719] [2021-11-25 19:59:21,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:21,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 19:59:21,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:21,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 19:59:21,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-25 19:59:21,860 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:21,949 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-11-25 19:59:21,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 19:59:21,949 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-25 19:59:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:21,950 INFO L225 Difference]: With dead ends: 38 [2021-11-25 19:59:21,950 INFO L226 Difference]: Without dead ends: 38 [2021-11-25 19:59:21,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-25 19:59:21,951 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 48 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:21,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 17 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:21,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-25 19:59:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-11-25 19:59:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.3) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-11-25 19:59:21,955 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 20 [2021-11-25 19:59:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:21,955 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-11-25 19:59:21,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-11-25 19:59:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-25 19:59:21,956 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:21,956 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:21,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:22,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-25 19:59:22,177 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:22,178 INFO L85 PathProgramCache]: Analyzing trace with hash -250310995, now seen corresponding path program 1 times [2021-11-25 19:59:22,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:22,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911103494] [2021-11-25 19:59:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:22,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 19:59:22,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:22,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911103494] [2021-11-25 19:59:22,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911103494] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 19:59:22,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 19:59:22,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 19:59:22,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004212778] [2021-11-25 19:59:22,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 19:59:22,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 19:59:22,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 19:59:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 19:59:22,237 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:22,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:22,270 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-11-25 19:59:22,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 19:59:22,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-25 19:59:22,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:22,272 INFO L225 Difference]: With dead ends: 36 [2021-11-25 19:59:22,272 INFO L226 Difference]: Without dead ends: 36 [2021-11-25 19:59:22,272 INFO L932 BasicCegarLoop]: 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 [2021-11-25 19:59:22,278 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:22,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 11 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 19:59:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-25 19:59:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-25 19:59:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-11-25 19:59:22,282 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 22 [2021-11-25 19:59:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:22,283 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-11-25 19:59:22,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:22,284 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-11-25 19:59:22,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:59:22,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:22,285 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:22,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-25 19:59:22,286 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:22,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:22,286 INFO L85 PathProgramCache]: Analyzing trace with hash 830242028, now seen corresponding path program 1 times [2021-11-25 19:59:22,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:22,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757704212] [2021-11-25 19:59:22,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:22,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:22,770 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:22,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757704212] [2021-11-25 19:59:22,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757704212] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:22,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959474655] [2021-11-25 19:59:22,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:22,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:22,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:22,772 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:22,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 19:59:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-25 19:59:22,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:22,963 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-25 19:59:22,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-25 19:59:23,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:59:23,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-25 19:59:23,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:23,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 26 [2021-11-25 19:59:23,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:23,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 27 [2021-11-25 19:59:23,586 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:23,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 16 [2021-11-25 19:59:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:23,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:23,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2021-11-25 19:59:24,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:24,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 155 treesize of output 157 [2021-11-25 19:59:28,390 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 19:59:28,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 1 [2021-11-25 19:59:28,396 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:28,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959474655] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 19:59:28,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [608514892] [2021-11-25 19:59:28,401 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 19:59:28,401 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 19:59:28,401 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 19:59:28,402 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 19:59:28,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 19:59:28,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 19:59:28,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 19:59:28,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 19:59:28,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-25 19:59:28,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 19:59:28,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 19:59:28,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 19:59:28,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 19:59:28,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 19:59:28,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:28,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:59:28,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:28,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 19:59:28,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 19:59:28,841 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:28,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2021-11-25 19:59:28,870 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:28,916 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 19:59:28,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 346 treesize of output 338 [2021-11-25 19:59:28,969 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:28,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 343 [2021-11-25 19:59:29,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:29,217 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 19:59:29,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 370 treesize of output 375 [2021-11-25 19:59:29,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:29,281 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:29,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 379 treesize of output 380 [2021-11-25 19:59:29,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:29,344 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:29,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 373 treesize of output 374 [2021-11-25 19:59:29,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:29,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:29,899 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 19:59:29,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 495 treesize of output 488 [2021-11-25 19:59:29,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:29,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:29,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:29,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:29,932 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 19:59:29,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 577 treesize of output 554 [2021-11-25 19:59:29,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:29,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:29,969 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 19:59:29,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 573 treesize of output 566 [2021-11-25 19:59:30,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:30,182 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 19:59:30,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2021-11-25 19:59:30,442 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:30,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2021-11-25 19:59:30,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:30,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:30,504 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 19:59:30,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 346 treesize of output 338 [2021-11-25 19:59:30,559 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 19:59:30,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 336 treesize of output 343 [2021-11-25 19:59:30,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:30,968 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 19:59:30,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 683 treesize of output 668 [2021-11-25 19:59:30,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:31,015 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:31,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 688 treesize of output 689 [2021-11-25 19:59:31,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:31,063 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 19:59:31,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 682 treesize of output 683 [2021-11-25 19:59:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:31,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:31,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:31,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:31,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:31,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:31,515 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 19:59:31,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 530 treesize of output 507 [2021-11-25 19:59:31,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:31,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:31,548 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 19:59:31,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 526 treesize of output 519 [2021-11-25 19:59:31,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:31,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:31,581 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 19:59:31,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 586 treesize of output 579 [2021-11-25 19:59:31,809 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-25 19:59:31,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-25 19:59:31,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 19:59:31,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:31,853 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:31,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 84 treesize of output 62 [2021-11-25 19:59:31,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:31,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 45 [2021-11-25 19:59:32,035 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 19:59:32,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-25 19:59:32,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 19:59:32,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:59:32,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:59:32,266 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 19:59:32,267 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2021-11-25 19:59:32,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:59:32,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 19:59:32,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:59:32,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 19:59:32,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 19:59:32,500 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 19:59:36,410 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2061#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (= |ULTIMATE.start_sll_remove_first_#t~mem6#1.base| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|)) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (not (= (select |#valid| |ULTIMATE.start_sll_remove_first_#t~mem6#1.base|) 1)) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 19:59:36,411 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 19:59:36,411 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 19:59:36,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 39 [2021-11-25 19:59:36,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827344427] [2021-11-25 19:59:36,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 19:59:36,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-25 19:59:36,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 19:59:36,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-25 19:59:36,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2512, Unknown=0, NotChecked=0, Total=2756 [2021-11-25 19:59:36,414 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 40 states, 39 states have (on average 1.564102564102564) internal successors, (61), 40 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:37,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 19:59:37,287 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-11-25 19:59:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 19:59:37,288 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.564102564102564) internal successors, (61), 40 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-25 19:59:37,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 19:59:37,288 INFO L225 Difference]: With dead ends: 46 [2021-11-25 19:59:37,288 INFO L226 Difference]: Without dead ends: 46 [2021-11-25 19:59:37,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=515, Invalid=4041, Unknown=0, NotChecked=0, Total=4556 [2021-11-25 19:59:37,290 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 74 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 19:59:37,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 135 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 351 Invalid, 0 Unknown, 227 Unchecked, 0.3s Time] [2021-11-25 19:59:37,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-25 19:59:37,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2021-11-25 19:59:37,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:37,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-11-25 19:59:37,293 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 23 [2021-11-25 19:59:37,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 19:59:37,294 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-11-25 19:59:37,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.564102564102564) internal successors, (61), 40 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 19:59:37,294 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-11-25 19:59:37,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-25 19:59:37,295 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 19:59:37,295 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 19:59:37,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 19:59:37,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-25 19:59:37,509 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 19:59:37,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 19:59:37,509 INFO L85 PathProgramCache]: Analyzing trace with hash 830242029, now seen corresponding path program 1 times [2021-11-25 19:59:37,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 19:59:37,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689569109] [2021-11-25 19:59:37,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:37,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 19:59:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:37,956 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:37,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 19:59:37,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689569109] [2021-11-25 19:59:37,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689569109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 19:59:37,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569433794] [2021-11-25 19:59:37,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 19:59:37,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 19:59:37,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 19:59:37,961 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 19:59:37,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 19:59:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 19:59:38,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-25 19:59:38,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 19:59:38,179 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 19:59:38,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-25 19:59:38,207 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 19:59:38,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 19:59:38,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:59:38,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 19:59:38,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 19:59:38,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 19:59:38,808 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-25 19:59:38,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 76 [2021-11-25 19:59:38,819 INFO L354 Elim1Store]: treesize reduction 49, result has 5.8 percent of original size [2021-11-25 19:59:38,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 55 [2021-11-25 19:59:38,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:38,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 42 treesize of output 22 [2021-11-25 19:59:38,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:38,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 19 [2021-11-25 19:59:38,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 19:59:38,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 19:59:39,504 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 19:59:39,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 470 treesize of output 468 [2021-11-25 19:59:39,648 INFO L354 Elim1Store]: treesize reduction 26, result has 76.6 percent of original size [2021-11-25 19:59:39,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 1094 treesize of output 1012 [2021-11-25 20:01:15,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:15,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:15,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569433794] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:01:15,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1443633200] [2021-11-25 20:01:15,529 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:01:15,529 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:01:15,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:01:15,530 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:01:15,530 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:01:15,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:01:15,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 20:01:15,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 20:01:15,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-25 20:01:15,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:01:15,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 20:01:15,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 20:01:15,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 20:01:15,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:15,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:01:15,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:15,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:01:15,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 31 [2021-11-25 20:01:15,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 20:01:15,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:15,897 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 20:01:15,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 337 [2021-11-25 20:01:15,934 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:15,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 342 [2021-11-25 20:01:15,990 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:15,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 336 [2021-11-25 20:01:16,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:16,378 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 20:01:16,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 850 treesize of output 823 [2021-11-25 20:01:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:16,428 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:16,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 851 treesize of output 852 [2021-11-25 20:01:16,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:16,488 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:16,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 845 treesize of output 840 [2021-11-25 20:01:16,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:16,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:16,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:16,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:16,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:16,927 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:01:16,929 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 530 treesize of output 507 [2021-11-25 20:01:16,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:16,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:16,957 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:01:16,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 526 treesize of output 519 [2021-11-25 20:01:16,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:16,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:16,994 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 20:01:16,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 616 treesize of output 609 [2021-11-25 20:01:17,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:17,183 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 20:01:17,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 510 treesize of output 514 [2021-11-25 20:01:17,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:17,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:17,425 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 20:01:17,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 337 [2021-11-25 20:01:17,462 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:17,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 342 [2021-11-25 20:01:17,495 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:17,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 336 [2021-11-25 20:01:17,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:18,009 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:18,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1495 treesize of output 1484 [2021-11-25 20:01:18,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:18,080 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 20:01:18,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1464 treesize of output 1401 [2021-11-25 20:01:18,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:18,135 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:18,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1461 treesize of output 1450 [2021-11-25 20:01:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:18,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:18,946 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:01:18,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 487 treesize of output 480 [2021-11-25 20:01:18,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:18,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:18,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:18,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:18,971 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:01:18,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 509 treesize of output 486 [2021-11-25 20:01:18,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:18,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:18,995 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:01:18,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 505 treesize of output 498 [2021-11-25 20:01:19,211 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-25 20:01:19,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-25 20:01:19,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:19,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:19,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 84 treesize of output 62 [2021-11-25 20:01:19,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:19,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 63 treesize of output 45 [2021-11-25 20:01:19,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:19,418 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:01:19,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-25 20:01:19,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:19,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:19,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:19,700 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:01:19,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2021-11-25 20:01:19,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:19,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:19,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:19,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:01:19,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:01:19,926 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:01:24,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2364#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (or (< (+ |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset| 4) 0) (< (select |#length| |ULTIMATE.start_sll_remove_first_#t~mem6#1.base|) (+ 8 |ULTIMATE.start_sll_remove_first_#t~mem6#1.offset|))) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:01:24,070 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:01:24,070 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:01:24,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2021-11-25 20:01:24,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717171360] [2021-11-25 20:01:24,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:01:24,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-25 20:01:24,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:24,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-25 20:01:24,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=2640, Unknown=0, NotChecked=0, Total=2862 [2021-11-25 20:01:24,073 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 41 states, 40 states have (on average 1.675) internal successors, (67), 41 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:25,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:25,576 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2021-11-25 20:01:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-25 20:01:25,577 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 41 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-25 20:01:25,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:25,577 INFO L225 Difference]: With dead ends: 45 [2021-11-25 20:01:25,577 INFO L226 Difference]: Without dead ends: 45 [2021-11-25 20:01:25,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=520, Invalid=4172, Unknown=0, NotChecked=0, Total=4692 [2021-11-25 20:01:25,579 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:25,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 267 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 493 Invalid, 0 Unknown, 70 Unchecked, 0.4s Time] [2021-11-25 20:01:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-25 20:01:25,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2021-11-25 20:01:25,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 40 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:25,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-11-25 20:01:25,582 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 23 [2021-11-25 20:01:25,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:25,583 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-11-25 20:01:25,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 41 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:25,583 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-11-25 20:01:25,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-25 20:01:25,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:25,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:01:25,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:01:25,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-25 20:01:25,797 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 20:01:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash -30696015, now seen corresponding path program 1 times [2021-11-25 20:01:25,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:25,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701747383] [2021-11-25 20:01:25,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:25,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:25,842 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:01:25,843 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:25,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701747383] [2021-11-25 20:01:25,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701747383] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:01:25,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841325122] [2021-11-25 20:01:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:25,844 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:01:25,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:01:25,851 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:01:25,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:01:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:25,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:01:25,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:01:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:01:26,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:01:26,090 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:01:26,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841325122] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:01:26,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1354896219] [2021-11-25 20:01:26,094 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 20:01:26,094 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:01:26,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:01:26,094 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:01:26,095 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:01:26,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:01:26,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 20:01:26,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:01:26,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:01:26,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 20:01:26,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 20:01:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 20:01:26,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 20:01:26,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 31 [2021-11-25 20:01:26,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:26,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:01:26,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:26,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:01:26,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 20:01:26,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,475 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:01:26,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2021-11-25 20:01:26,523 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:26,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2021-11-25 20:01:26,565 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:26,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2021-11-25 20:01:26,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,896 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:26,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 874 treesize of output 869 [2021-11-25 20:01:26,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:26,948 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:01:26,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 849 treesize of output 818 [2021-11-25 20:01:26,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:26,994 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:26,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 850 treesize of output 851 [2021-11-25 20:01:27,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:27,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:27,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:27,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:27,442 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:01:27,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 356 treesize of output 341 [2021-11-25 20:01:27,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:27,454 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:27,467 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:01:27,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 352 treesize of output 345 [2021-11-25 20:01:27,478 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:27,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:27,492 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 20:01:27,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 424 treesize of output 417 [2021-11-25 20:01:27,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:27,622 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 20:01:27,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2021-11-25 20:01:27,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:27,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:27,799 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:01:27,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2021-11-25 20:01:27,834 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:27,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2021-11-25 20:01:27,874 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:27,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2021-11-25 20:01:28,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:28,126 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:28,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 686 treesize of output 687 [2021-11-25 20:01:28,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:28,171 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:01:28,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 667 treesize of output 648 [2021-11-25 20:01:28,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:28,223 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:28,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 672 treesize of output 673 [2021-11-25 20:01:28,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:28,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:28,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:28,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:28,630 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:01:28,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 367 treesize of output 352 [2021-11-25 20:01:28,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:28,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:28,655 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:01:28,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 363 treesize of output 356 [2021-11-25 20:01:28,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:28,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:28,679 INFO L354 Elim1Store]: treesize reduction 51, result has 22.7 percent of original size [2021-11-25 20:01:28,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 435 treesize of output 428 [2021-11-25 20:01:28,856 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-25 20:01:28,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-25 20:01:28,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:28,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:28,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 84 treesize of output 62 [2021-11-25 20:01:28,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:28,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 63 treesize of output 45 [2021-11-25 20:01:28,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:29,056 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:01:29,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-25 20:01:29,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:29,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:29,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:29,249 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:01:29,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2021-11-25 20:01:29,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:29,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:29,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:29,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:01:29,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:01:29,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:01:29,485 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:01:32,535 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2637#(and (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_19| Int)) (and (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_19|) 0) 0) (<= 0 |v_ULTIMATE.start_main_~#s~0#1.base_19|) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_19|)) (= 0 (select |#valid| |v_ULTIMATE.start_main_~#s~0#1.base_19|)) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_19|) 0) 0))) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_main_#res#1| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:01:32,535 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:01:32,535 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:01:32,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-25 20:01:32,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035081567] [2021-11-25 20:01:32,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:01:32,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:01:32,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:32,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:01:32,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-11-25 20:01:32,536 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:32,566 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-11-25 20:01:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 20:01:32,566 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-25 20:01:32,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:32,567 INFO L225 Difference]: With dead ends: 41 [2021-11-25 20:01:32,567 INFO L226 Difference]: Without dead ends: 41 [2021-11-25 20:01:32,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2021-11-25 20:01:32,568 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 70 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:32,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 34 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:01:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-11-25 20:01:32,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-11-25 20:01:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.2) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-11-25 20:01:32,570 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 24 [2021-11-25 20:01:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:32,570 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-11-25 20:01:32,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:32,571 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-11-25 20:01:32,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-25 20:01:32,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:32,572 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:01:32,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:01:32,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:01:32,777 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 20:01:32,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:32,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1001289899, now seen corresponding path program 1 times [2021-11-25 20:01:32,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:32,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386200300] [2021-11-25 20:01:32,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:32,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:32,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:33,009 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:33,010 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:33,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386200300] [2021-11-25 20:01:33,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386200300] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:01:33,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119970015] [2021-11-25 20:01:33,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:33,011 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:01:33,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:01:33,012 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:01:33,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:01:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-25 20:01:33,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:01:33,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:33,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 19 treesize of output 11 [2021-11-25 20:01:33,546 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-25 20:01:33,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 36 treesize of output 33 [2021-11-25 20:01:33,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:33,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-25 20:01:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:33,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:01:33,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-25 20:01:33,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:33,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 88 treesize of output 88 [2021-11-25 20:01:33,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:33,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 78 [2021-11-25 20:01:33,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:33,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:34,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 140 [2021-11-25 20:01:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:34,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119970015] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:01:34,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [716639871] [2021-11-25 20:01:34,370 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:01:34,370 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:01:34,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:01:34,371 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:01:34,371 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:01:34,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:01:34,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 20:01:34,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2021-11-25 20:01:34,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 20:01:34,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:01:34,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 20:01:34,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 20:01:34,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 20:01:34,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:34,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:01:34,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 31 [2021-11-25 20:01:34,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:34,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:01:34,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 20:01:34,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:34,674 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:01:34,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2021-11-25 20:01:34,707 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:34,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2021-11-25 20:01:34,741 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:34,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2021-11-25 20:01:35,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:35,094 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:35,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1196 treesize of output 1191 [2021-11-25 20:01:35,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:35,159 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:35,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1184 treesize of output 1179 [2021-11-25 20:01:35,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:35,213 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:01:35,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1159 treesize of output 1108 [2021-11-25 20:01:35,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:35,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:35,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:35,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:35,765 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:01:35,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 363 treesize of output 348 [2021-11-25 20:01:35,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:35,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:35,792 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:01:35,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 359 treesize of output 352 [2021-11-25 20:01:35,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:35,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:35,819 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 20:01:35,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 389 treesize of output 382 [2021-11-25 20:01:35,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:35,959 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 20:01:35,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 450 treesize of output 446 [2021-11-25 20:01:36,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:36,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:36,128 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:01:36,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 352 treesize of output 334 [2021-11-25 20:01:36,161 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:36,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 346 treesize of output 353 [2021-11-25 20:01:36,194 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:36,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 347 [2021-11-25 20:01:36,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:36,549 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:36,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 874 treesize of output 869 [2021-11-25 20:01:36,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:36,599 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-25 20:01:36,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 849 treesize of output 818 [2021-11-25 20:01:36,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:36,653 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:36,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 850 treesize of output 851 [2021-11-25 20:01:37,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:37,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:37,124 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:01:37,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 352 treesize of output 345 [2021-11-25 20:01:37,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:37,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:37,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:37,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:37,154 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 20:01:37,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 428 treesize of output 413 [2021-11-25 20:01:37,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:37,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:37,185 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 20:01:37,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 424 treesize of output 417 [2021-11-25 20:01:37,369 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-25 20:01:37,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-25 20:01:37,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:37,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:37,429 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:37,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 84 treesize of output 62 [2021-11-25 20:01:37,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:37,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 63 treesize of output 45 [2021-11-25 20:01:37,615 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:01:37,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-25 20:01:37,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:37,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:37,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:37,838 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:01:37,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2021-11-25 20:01:37,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:37,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:37,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:37,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:01:38,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:01:38,002 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:01:41,768 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2920#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (not (= |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset| 0)) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:01:41,768 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:01:41,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:01:41,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2021-11-25 20:01:41,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37987749] [2021-11-25 20:01:41,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:01:41,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 20:01:41,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:41,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 20:01:41,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2181, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 20:01:41,770 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:42,065 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-25 20:01:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-25 20:01:42,065 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-25 20:01:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:42,066 INFO L225 Difference]: With dead ends: 43 [2021-11-25 20:01:42,066 INFO L226 Difference]: Without dead ends: 43 [2021-11-25 20:01:42,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=389, Invalid=2803, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 20:01:42,068 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:42,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 232 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 191 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2021-11-25 20:01:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-25 20:01:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-11-25 20:01:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.1891891891891893) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-11-25 20:01:42,071 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 25 [2021-11-25 20:01:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:42,071 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-11-25 20:01:42,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 37 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:42,072 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-11-25 20:01:42,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-25 20:01:42,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:42,073 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:01:42,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-25 20:01:42,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:01:42,289 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 20:01:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:42,290 INFO L85 PathProgramCache]: Analyzing trace with hash -975215707, now seen corresponding path program 1 times [2021-11-25 20:01:42,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:42,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56662408] [2021-11-25 20:01:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:42,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:42,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:42,536 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:42,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56662408] [2021-11-25 20:01:42,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56662408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:01:42,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544124290] [2021-11-25 20:01:42,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:42,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:01:42,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:01:42,539 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:01:42,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-25 20:01:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-25 20:01:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:01:42,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:42,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-25 20:01:43,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:43,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2021-11-25 20:01:43,183 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-11-25 20:01:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:43,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:01:43,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-25 20:01:43,526 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:43,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 164 treesize of output 174 [2021-11-25 20:01:43,733 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:43,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544124290] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:01:43,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [54375418] [2021-11-25 20:01:43,735 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2021-11-25 20:01:43,735 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:01:43,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:01:43,735 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:01:43,736 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:01:43,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:01:43,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 20:01:43,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 20:01:43,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:01:43,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:01:43,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-25 20:01:43,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 20:01:43,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 20:01:43,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 31 [2021-11-25 20:01:43,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:43,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:01:43,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:43,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:01:43,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:43,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 20:01:44,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:44,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:44,042 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 20:01:44,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 337 [2021-11-25 20:01:44,079 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:44,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 342 [2021-11-25 20:01:44,122 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:44,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 336 [2021-11-25 20:01:44,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:44,598 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 20:01:44,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1167 treesize of output 1124 [2021-11-25 20:01:44,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:44,650 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:44,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1168 treesize of output 1163 [2021-11-25 20:01:44,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:44,702 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:44,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1156 treesize of output 1145 [2021-11-25 20:01:45,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:45,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:45,314 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:01:45,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 352 treesize of output 345 [2021-11-25 20:01:45,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:45,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:45,339 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-25 20:01:45,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 424 treesize of output 417 [2021-11-25 20:01:45,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:45,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:45,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:45,359 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-25 20:01:45,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 440 treesize of output 425 [2021-11-25 20:01:45,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:45,500 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 20:01:45,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 425 treesize of output 429 [2021-11-25 20:01:45,706 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:45,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 339 treesize of output 346 [2021-11-25 20:01:45,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:45,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:45,748 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 20:01:45,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 339 treesize of output 331 [2021-11-25 20:01:45,783 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:01:45,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 336 [2021-11-25 20:01:46,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:46,284 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 20:01:46,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1165 treesize of output 1118 [2021-11-25 20:01:46,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:46,339 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:46,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1162 treesize of output 1157 [2021-11-25 20:01:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:46,395 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:01:46,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1150 treesize of output 1145 [2021-11-25 20:01:47,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:47,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:47,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:47,203 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:47,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:47,210 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:01:47,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 505 treesize of output 482 [2021-11-25 20:01:47,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:47,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:47,250 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:01:47,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 501 treesize of output 494 [2021-11-25 20:01:47,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:47,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:47,277 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 20:01:47,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 543 treesize of output 536 [2021-11-25 20:01:47,462 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-25 20:01:47,462 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-25 20:01:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:47,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:01:47,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 84 treesize of output 62 [2021-11-25 20:01:47,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:47,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 63 treesize of output 45 [2021-11-25 20:01:47,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:47,649 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:01:47,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-25 20:01:47,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:47,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:47,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:47,939 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:01:47,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2021-11-25 20:01:47,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:47,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:01:47,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:01:48,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:01:48,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:01:48,130 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:01:52,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3221#(and (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.offset|) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_sll_remove_first_~head#1.base|) 1) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (<= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_#in~head#1.base|) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~data~0#1| 1) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |#StackHeapBarrier| |ULTIMATE.start_sll_remove_first_#t~mem8#1.base|) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (= |ULTIMATE.start_main_~len~0#1| 2) (<= |ULTIMATE.start_main_~#s~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#s~0#1.base|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_sll_remove_first_~head#1.base|) |ULTIMATE.start_sll_remove_first_~head#1.offset|) |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset|) (<= |ULTIMATE.start_sll_remove_first_~head#1.offset| 0) (<= 0 |ULTIMATE.start_sll_remove_first_~head#1.base|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start_sll_remove_first_#t~mem8#1.offset| 0) (<= (+ |ULTIMATE.start_sll_remove_first_~head#1.offset| 4) (select |#length| |ULTIMATE.start_sll_remove_first_~head#1.base|)) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_main_~#s~0#1.offset|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (<= |ULTIMATE.start_sll_remove_first_#in~head#1.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-25 20:01:52,286 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:01:52,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:01:52,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 36 [2021-11-25 20:01:52,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73496250] [2021-11-25 20:01:52,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:01:52,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-25 20:01:52,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-25 20:01:52,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2021-11-25 20:01:52,288 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:53,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:53,051 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-11-25 20:01:53,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-25 20:01:53,052 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-25 20:01:53,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:53,052 INFO L225 Difference]: With dead ends: 44 [2021-11-25 20:01:53,052 INFO L226 Difference]: Without dead ends: 44 [2021-11-25 20:01:53,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=478, Invalid=3062, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 20:01:53,054 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 118 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:53,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 143 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 222 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2021-11-25 20:01:53,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-25 20:01:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-11-25 20:01:53,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-11-25 20:01:53,065 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 26 [2021-11-25 20:01:53,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:53,065 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-11-25 20:01:53,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 37 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:53,065 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-11-25 20:01:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-25 20:01:53,068 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:53,068 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1] [2021-11-25 20:01:53,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-25 20:01:53,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:01:53,277 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 20:01:53,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:53,277 INFO L85 PathProgramCache]: Analyzing trace with hash 471864012, now seen corresponding path program 2 times [2021-11-25 20:01:53,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:53,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545350741] [2021-11-25 20:01:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:53,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-25 20:01:53,352 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545350741] [2021-11-25 20:01:53,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545350741] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:01:53,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:01:53,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 20:01:53,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408642046] [2021-11-25 20:01:53,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:01:53,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:01:53,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:01:53,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:01:53,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:01:53,354 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:01:53,390 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-11-25 20:01:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 20:01:53,391 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-25 20:01:53,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:01:53,391 INFO L225 Difference]: With dead ends: 35 [2021-11-25 20:01:53,391 INFO L226 Difference]: Without dead ends: 35 [2021-11-25 20:01:53,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-25 20:01:53,393 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:01:53,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:01:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-25 20:01:53,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-25 20:01:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-11-25 20:01:53,395 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2021-11-25 20:01:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:01:53,396 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-11-25 20:01:53,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:01:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-11-25 20:01:53,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 20:01:53,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:01:53,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:01:53,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-25 20:01:53,400 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 20:01:53,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:01:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1744487377, now seen corresponding path program 2 times [2021-11-25 20:01:53,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:01:53,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606275920] [2021-11-25 20:01:53,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:01:53,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:01:53,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:01:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:54,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:01:54,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606275920] [2021-11-25 20:01:54,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606275920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:01:54,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653541838] [2021-11-25 20:01:54,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-25 20:01:54,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:01:54,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:01:54,230 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:01:54,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-25 20:01:54,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-25 20:01:54,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-25 20:01:54,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-25 20:01:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:01:54,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:01:55,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2021-11-25 20:01:56,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:56,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:56,154 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-11-25 20:01:56,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 68 [2021-11-25 20:01:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:01:56,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:01:56,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 88 treesize of output 48 [2021-11-25 20:01:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:01:57,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:01:58,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 82 [2021-11-25 20:01:58,831 INFO L354 Elim1Store]: treesize reduction 4, result has 87.1 percent of original size [2021-11-25 20:01:58,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 297 treesize of output 267 [2021-11-25 20:02:15,127 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:15,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653541838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:02:15,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064370417] [2021-11-25 20:02:15,129 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2021-11-25 20:02:15,130 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:02:15,130 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:02:15,130 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:02:15,130 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:02:15,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-25 20:02:15,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 8 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 30 [2021-11-25 20:02:15,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 21 [2021-11-25 20:02:15,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:02:15,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-25 20:02:15,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 20:02:15,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 13 [2021-11-25 20:02:15,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 28 [2021-11-25 20:02:15,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:15,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:02:15,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 41 treesize of output 31 [2021-11-25 20:02:15,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:15,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-11-25 20:02:15,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 43 [2021-11-25 20:02:15,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:15,497 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 20:02:15,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 337 [2021-11-25 20:02:15,533 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:02:15,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 342 [2021-11-25 20:02:15,568 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:02:15,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 336 [2021-11-25 20:02:16,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:16,082 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:02:16,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1495 treesize of output 1484 [2021-11-25 20:02:16,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:16,151 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 20:02:16,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 1464 treesize of output 1401 [2021-11-25 20:02:16,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:16,206 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:02:16,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1461 treesize of output 1450 [2021-11-25 20:02:17,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:17,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:17,079 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:02:17,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 632 treesize of output 625 [2021-11-25 20:02:17,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:17,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:17,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:17,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:17,105 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:02:17,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 660 treesize of output 629 [2021-11-25 20:02:17,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:17,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:17,132 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-25 20:02:17,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 656 treesize of output 649 [2021-11-25 20:02:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:17,300 INFO L354 Elim1Store]: treesize reduction 170, result has 13.7 percent of original size [2021-11-25 20:02:17,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 405 treesize of output 409 [2021-11-25 20:02:17,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:17,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:17,488 INFO L354 Elim1Store]: treesize reduction 49, result has 25.8 percent of original size [2021-11-25 20:02:17,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 345 treesize of output 337 [2021-11-25 20:02:17,522 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:02:17,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 335 treesize of output 342 [2021-11-25 20:02:17,558 INFO L354 Elim1Store]: treesize reduction 27, result has 38.6 percent of original size [2021-11-25 20:02:17,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 336 [2021-11-25 20:02:17,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:17,771 INFO L354 Elim1Store]: treesize reduction 56, result has 29.1 percent of original size [2021-11-25 20:02:17,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 363 treesize of output 368 [2021-11-25 20:02:17,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:17,812 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:02:17,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 372 treesize of output 373 [2021-11-25 20:02:17,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:17,852 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-25 20:02:17,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 366 treesize of output 367 [2021-11-25 20:02:18,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:18,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:18,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:18,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:18,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:18,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:18,230 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:02:18,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 521 treesize of output 498 [2021-11-25 20:02:18,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:18,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:18,259 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-25 20:02:18,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 517 treesize of output 510 [2021-11-25 20:02:18,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:18,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:18,287 INFO L354 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2021-11-25 20:02:18,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 571 treesize of output 564 [2021-11-25 20:02:18,480 INFO L354 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2021-11-25 20:02:18,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 25 treesize of output 29 [2021-11-25 20:02:18,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:18,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:18,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 case distinctions, treesize of input 84 treesize of output 62 [2021-11-25 20:02:18,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:18,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 63 treesize of output 45 [2021-11-25 20:02:18,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:02:18,679 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:02:18,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 45 [2021-11-25 20:02:18,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:02:18,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:02:18,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:02:18,947 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-25 20:02:18,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 45 [2021-11-25 20:02:18,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:02:18,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-25 20:02:19,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:02:19,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:02:19,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-25 20:02:19,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:02:19,252 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:02:24,676 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3671#(and (< |ULTIMATE.start_main_~i~0#1| 0) (<= 1 |ULTIMATE.start_sll_create_#in~data#1|) (<= |ULTIMATE.start_sll_create_#in~data#1| 1) (<= |ULTIMATE.start_sll_create_~head~0#1.offset| 0) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= |ULTIMATE.start_sll_create_~len#1| 0) (<= |ULTIMATE.start_sll_create_#res#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_22| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#s~0#1.base_22|) (or (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_22|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_22|)) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_22|) 0) 0) (= |#NULL.base| 0)) (and (= |ULTIMATE.start_node_create_~temp~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_main_~#s~0#1.base_22|) 0) 0) (<= 4 (select |#length| |v_ULTIMATE.start_main_~#s~0#1.base_22|)) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |#NULL.offset| 0) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_main_~#s~0#1.base_22|) 0) 0) (= |#NULL.base| 0))) (= (select |#valid| |v_ULTIMATE.start_main_~#s~0#1.base_22|) 0))) (<= 1 |ULTIMATE.start_sll_create_~data#1|) (<= |ULTIMATE.start_sll_create_~data#1| 1) (<= |ULTIMATE.start_sll_create_#in~len#1| 2) (<= 0 |ULTIMATE.start_sll_create_~len#1|) (<= 0 |ULTIMATE.start_sll_create_#res#1.offset|) (<= 0 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_sll_create_#in~len#1|) (<= 0 |ULTIMATE.start_sll_create_~head~0#1.offset|) (= |ULTIMATE.start_main_#res#1| 0))' at error location [2021-11-25 20:02:24,676 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:02:24,676 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:02:24,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 58 [2021-11-25 20:02:24,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273298796] [2021-11-25 20:02:24,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:02:24,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-25 20:02:24,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:02:24,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-25 20:02:24,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=5398, Unknown=0, NotChecked=0, Total=5700 [2021-11-25 20:02:24,679 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 60 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 59 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:02:26,056 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-25 20:02:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-25 20:02:26,056 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 59 states have internal predecessors, (91), 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 32 [2021-11-25 20:02:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:02:26,057 INFO L225 Difference]: With dead ends: 62 [2021-11-25 20:02:26,057 INFO L226 Difference]: Without dead ends: 61 [2021-11-25 20:02:26,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=402, Invalid=7080, Unknown=0, NotChecked=0, Total=7482 [2021-11-25 20:02:26,060 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:02:26,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 125 Unchecked, 0.1s Time] [2021-11-25 20:02:26,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-25 20:02:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-11-25 20:02:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-11-25 20:02:26,063 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 32 [2021-11-25 20:02:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:02:26,063 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-11-25 20:02:26,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.5423728813559323) internal successors, (91), 59 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:02:26,063 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-11-25 20:02:26,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-25 20:02:26,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:02:26,064 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-25 20:02:26,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-25 20:02:26,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:26,269 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 17 more)] === [2021-11-25 20:02:26,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:02:26,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1744487312, now seen corresponding path program 1 times [2021-11-25 20:02:26,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:02:26,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992141088] [2021-11-25 20:02:26,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:26,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:02:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:27,212 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:02:27,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992141088] [2021-11-25 20:02:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992141088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:02:27,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35490752] [2021-11-25 20:02:27,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:02:27,212 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:02:27,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:02:27,213 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:02:27,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c1ac7c52-8db8-4f47-a661-26bdbdf69c00/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-25 20:02:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:02:27,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-25 20:02:27,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:02:27,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-25 20:02:27,414 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-25 20:02:27,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-25 20:02:27,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:02:27,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-25 20:02:27,646 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:02:27,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-25 20:02:27,671 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:02:27,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-11-25 20:02:27,747 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:02:27,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-11-25 20:02:27,771 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-25 20:02:27,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2021-11-25 20:02:27,851 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-25 20:02:27,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 26 [2021-11-25 20:02:27,863 INFO L354 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2021-11-25 20:02:27,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 36 [2021-11-25 20:02:28,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2021-11-25 20:02:28,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:28,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:28,644 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-25 20:02:28,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 109 treesize of output 68 [2021-11-25 20:02:28,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 50 treesize of output 48 [2021-11-25 20:02:28,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-25 20:02:29,089 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-25 20:02:29,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-25 20:02:29,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:29,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-25 20:02:29,576 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-25 20:02:29,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 83 [2021-11-25 20:02:29,586 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:02:29,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 58 [2021-11-25 20:02:29,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-25 20:02:29,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 39 [2021-11-25 20:02:29,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 10 [2021-11-25 20:02:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:02:29,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:02:30,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2021-11-25 20:02:30,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-25 20:02:31,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-25 20:02:31,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2021-11-25 20:02:31,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 116 [2021-11-25 20:02:31,453 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:31,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 217 treesize of output 165 [2021-11-25 20:02:31,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-11-25 20:02:31,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-11-25 20:02:31,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-11-25 20:02:31,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-11-25 20:02:32,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-11-25 20:02:32,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-11-25 20:02:32,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-11-25 20:02:32,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 74 [2021-11-25 20:02:33,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:33,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 327 treesize of output 217 [2021-11-25 20:02:33,380 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:33,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 217 treesize of output 167 [2021-11-25 20:02:33,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 20:02:33,569 INFO L354 Elim1Store]: treesize reduction 8, result has 95.7 percent of original size [2021-11-25 20:02:33,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 1365 treesize of output 1356 [2021-11-25 20:02:34,088 INFO L354 Elim1Store]: treesize reduction 88, result has 80.5 percent of original size [2021-11-25 20:02:34,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 11 new quantified variables, introduced 28 case distinctions, treesize of input 3615 treesize of output 3428 [2021-11-25 20:02:34,226 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:34,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 2596 treesize of output 2394 [2021-11-25 20:02:34,384 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-25 20:02:34,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3063 treesize of output 2859 [2021-11-25 20:02:34,598 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2021-11-25 20:02:34,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2754 treesize of output 2298