./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 16:06:26,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 16:06:26,741 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 16:06:26,776 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 16:06:26,779 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 16:06:26,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 16:06:26,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 16:06:26,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 16:06:26,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 16:06:26,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 16:06:26,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 16:06:26,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 16:06:26,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 16:06:26,806 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 16:06:26,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 16:06:26,812 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 16:06:26,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 16:06:26,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 16:06:26,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 16:06:26,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 16:06:26,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 16:06:26,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 16:06:26,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 16:06:26,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 16:06:26,841 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 16:06:26,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 16:06:26,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 16:06:26,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 16:06:26,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 16:06:26,850 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 16:06:26,851 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 16:06:26,852 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 16:06:26,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 16:06:26,855 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 16:06:26,857 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 16:06:26,857 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 16:06:26,858 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 16:06:26,858 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 16:06:26,858 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 16:06:26,859 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 16:06:26,860 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 16:06:26,860 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 16:06:26,883 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 16:06:26,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 16:06:26,883 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 16:06:26,883 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 16:06:26,884 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 16:06:26,884 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 16:06:26,884 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 16:06:26,885 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 16:06:26,885 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 16:06:26,885 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 16:06:26,885 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 16:06:26,885 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 16:06:26,886 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 16:06:26,886 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 16:06:26,886 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 16:06:26,886 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 16:06:26,886 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 16:06:26,886 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 16:06:26,887 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 16:06:26,887 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 16:06:26,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 16:06:26,888 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 16:06:26,888 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 16:06:26,888 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 16:06:26,888 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 16:06:26,889 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 16:06:26,889 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 16:06:26,889 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 16:06:26,889 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 16:06:26,889 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 16:06:26,890 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 16:06:26,890 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 16:06:26,890 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 16:06:26,890 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 16:06:26,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 16:06:26,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:06:26,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 16:06:26,891 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 16:06:26,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 16:06:26,891 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 16:06:26,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 16:06:26,892 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 16:06:26,892 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6e9221de91e231efa38b63f264828813e89f68c8ac306a629b3513c0e7bf1ed0 [2022-11-23 16:06:27,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 16:06:27,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 16:06:27,270 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 16:06:27,272 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 16:06:27,272 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 16:06:27,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2022-11-23 16:06:30,441 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 16:06:30,737 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 16:06:30,738 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/sv-benchmarks/c/memsafety-ext2/length_test03-1.i [2022-11-23 16:06:30,751 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/data/eab7eb1e2/1143ae1e7b3f48abb96f256b2061f922/FLAGeb7eb7779 [2022-11-23 16:06:30,766 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/data/eab7eb1e2/1143ae1e7b3f48abb96f256b2061f922 [2022-11-23 16:06:30,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 16:06:30,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 16:06:30,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 16:06:30,772 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 16:06:30,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 16:06:30,782 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:06:30" (1/1) ... [2022-11-23 16:06:30,783 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@146d59bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:30, skipping insertion in model container [2022-11-23 16:06:30,783 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:06:30" (1/1) ... [2022-11-23 16:06:30,792 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 16:06:30,844 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 16:06:31,305 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:06:31,321 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 16:06:31,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 16:06:31,431 INFO L208 MainTranslator]: Completed translation [2022-11-23 16:06:31,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31 WrapperNode [2022-11-23 16:06:31,433 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 16:06:31,435 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 16:06:31,435 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 16:06:31,435 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 16:06:31,443 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,480 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,503 INFO L138 Inliner]: procedures = 123, calls = 38, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 98 [2022-11-23 16:06:31,504 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 16:06:31,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 16:06:31,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 16:06:31,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 16:06:31,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,515 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,532 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,536 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,558 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,564 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 16:06:31,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 16:06:31,569 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 16:06:31,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 16:06:31,570 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (1/1) ... [2022-11-23 16:06:31,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 16:06:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:06:31,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 16:06:31,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 16:06:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 16:06:31,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 16:06:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 16:06:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-23 16:06:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-23 16:06:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 16:06:31,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 16:06:31,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 16:06:31,667 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 16:06:31,667 INFO L130 BoogieDeclarations]: Found specification of procedure append [2022-11-23 16:06:31,667 INFO L138 BoogieDeclarations]: Found implementation of procedure append [2022-11-23 16:06:31,765 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 16:06:31,767 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 16:06:32,311 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 16:06:32,403 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 16:06:32,403 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-23 16:06:32,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:06:32 BoogieIcfgContainer [2022-11-23 16:06:32,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 16:06:32,408 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 16:06:32,408 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 16:06:32,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 16:06:32,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:06:30" (1/3) ... [2022-11-23 16:06:32,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c34212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:06:32, skipping insertion in model container [2022-11-23 16:06:32,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:06:31" (2/3) ... [2022-11-23 16:06:32,419 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c34212 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:06:32, skipping insertion in model container [2022-11-23 16:06:32,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:06:32" (3/3) ... [2022-11-23 16:06:32,421 INFO L112 eAbstractionObserver]: Analyzing ICFG length_test03-1.i [2022-11-23 16:06:32,442 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 16:06:32,442 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-11-23 16:06:32,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 16:06:32,497 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6d68f308, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 16:06:32,497 INFO L358 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2022-11-23 16:06:32,503 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 108 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 16:06:32,509 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:32,509 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 16:06:32,510 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:32,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:32,515 INFO L85 PathProgramCache]: Analyzing trace with hash 6824, now seen corresponding path program 1 times [2022-11-23 16:06:32,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:32,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72871252] [2022-11-23 16:06:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:32,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:32,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:32,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72871252] [2022-11-23 16:06:32,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72871252] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:32,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:32,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 16:06:32,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405313180] [2022-11-23 16:06:32,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:32,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:32,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:32,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:32,761 INFO L87 Difference]: Start difference. First operand has 112 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 108 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:33,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:33,001 INFO L93 Difference]: Finished difference Result 144 states and 153 transitions. [2022-11-23 16:06:33,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-23 16:06:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:33,014 INFO L225 Difference]: With dead ends: 144 [2022-11-23 16:06:33,014 INFO L226 Difference]: Without dead ends: 143 [2022-11-23 16:06:33,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:33,020 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 44 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:33,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 131 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:06:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-23 16:06:33,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 109. [2022-11-23 16:06:33,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 105 states have internal predecessors, (111), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2022-11-23 16:06:33,066 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 2 [2022-11-23 16:06:33,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:33,067 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2022-11-23 16:06:33,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2022-11-23 16:06:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-23 16:06:33,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:33,068 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-23 16:06:33,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 16:06:33,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:33,069 INFO L85 PathProgramCache]: Analyzing trace with hash 6825, now seen corresponding path program 1 times [2022-11-23 16:06:33,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:33,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988871483] [2022-11-23 16:06:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:33,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:33,166 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:33,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988871483] [2022-11-23 16:06:33,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988871483] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:33,166 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:33,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-23 16:06:33,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296586582] [2022-11-23 16:06:33,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:33,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:33,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:33,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:33,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:33,169 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:33,293 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-11-23 16:06:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:33,294 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-23 16:06:33,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:33,295 INFO L225 Difference]: With dead ends: 109 [2022-11-23 16:06:33,295 INFO L226 Difference]: Without dead ends: 109 [2022-11-23 16:06:33,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:33,297 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 8 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:33,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:33,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-23 16:06:33,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-11-23 16:06:33,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 49 states have (on average 2.2244897959183674) internal successors, (109), 103 states have internal predecessors, (109), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:33,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 113 transitions. [2022-11-23 16:06:33,308 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 113 transitions. Word has length 2 [2022-11-23 16:06:33,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:33,308 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 113 transitions. [2022-11-23 16:06:33,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:33,309 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 113 transitions. [2022-11-23 16:06:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 16:06:33,310 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:33,310 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 16:06:33,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 16:06:33,311 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash 6562959, now seen corresponding path program 1 times [2022-11-23 16:06:33,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:33,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366379718] [2022-11-23 16:06:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:33,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:33,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:33,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:33,390 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:33,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366379718] [2022-11-23 16:06:33,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366379718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:33,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:33,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:06:33,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263372861] [2022-11-23 16:06:33,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:33,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:33,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:33,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:33,393 INFO L87 Difference]: Start difference. First operand 107 states and 113 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) [2022-11-23 16:06:33,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:33,542 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2022-11-23 16:06:33,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:33,543 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 [2022-11-23 16:06:33,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:33,547 INFO L225 Difference]: With dead ends: 122 [2022-11-23 16:06:33,548 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 16:06:33,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:33,550 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 22 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:33,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 133 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 16:06:33,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2022-11-23 16:06:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 53 states have (on average 2.150943396226415) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:33,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2022-11-23 16:06:33,572 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 4 [2022-11-23 16:06:33,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:33,572 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2022-11-23 16:06:33,573 INFO L496 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) [2022-11-23 16:06:33,573 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2022-11-23 16:06:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-23 16:06:33,573 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:33,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-23 16:06:33,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 16:06:33,574 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:33,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash 6562960, now seen corresponding path program 1 times [2022-11-23 16:06:33,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:33,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007591182] [2022-11-23 16:06:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:33,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:33,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:33,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:33,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007591182] [2022-11-23 16:06:33,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007591182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:33,745 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:33,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:06:33,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068393192] [2022-11-23 16:06:33,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:33,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:33,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:33,747 INFO L87 Difference]: Start difference. First operand 109 states and 118 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) [2022-11-23 16:06:33,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:33,878 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2022-11-23 16:06:33,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:33,879 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 [2022-11-23 16:06:33,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:33,880 INFO L225 Difference]: With dead ends: 109 [2022-11-23 16:06:33,880 INFO L226 Difference]: Without dead ends: 109 [2022-11-23 16:06:33,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:33,892 INFO L413 NwaCegarLoop]: 92 mSDtfsCounter, 3 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:33,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 144 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:33,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-23 16:06:33,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2022-11-23 16:06:33,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 53 states have (on average 2.1132075471698113) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:33,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2022-11-23 16:06:33,901 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 4 [2022-11-23 16:06:33,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:33,901 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2022-11-23 16:06:33,901 INFO L496 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) [2022-11-23 16:06:33,901 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2022-11-23 16:06:33,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 16:06:33,902 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:33,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:33,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 16:06:33,903 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting appendErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:33,907 INFO L85 PathProgramCache]: Analyzing trace with hash 152914734, now seen corresponding path program 1 times [2022-11-23 16:06:33,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:33,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847211590] [2022-11-23 16:06:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:33,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:34,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:34,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847211590] [2022-11-23 16:06:34,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847211590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:34,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:34,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:06:34,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404057695] [2022-11-23 16:06:34,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:34,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:34,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:34,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:34,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:34,120 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:34,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:34,226 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2022-11-23 16:06:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 16:06:34,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:34,232 INFO L225 Difference]: With dead ends: 102 [2022-11-23 16:06:34,232 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 16:06:34,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:34,236 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 39 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:34,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 106 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 16:06:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-23 16:06:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 53 states have (on average 2.018867924528302) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:34,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 111 transitions. [2022-11-23 16:06:34,260 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 111 transitions. Word has length 9 [2022-11-23 16:06:34,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:34,260 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 111 transitions. [2022-11-23 16:06:34,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:34,262 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 111 transitions. [2022-11-23 16:06:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 16:06:34,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:34,263 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:34,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 16:06:34,267 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting appendErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:34,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:34,268 INFO L85 PathProgramCache]: Analyzing trace with hash 152914733, now seen corresponding path program 1 times [2022-11-23 16:06:34,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:34,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021957530] [2022-11-23 16:06:34,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:34,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:34,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:34,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:34,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021957530] [2022-11-23 16:06:34,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021957530] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:34,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:34,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 16:06:34,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910035720] [2022-11-23 16:06:34,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:34,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:34,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:34,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:34,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:34,356 INFO L87 Difference]: Start difference. First operand 102 states and 111 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:34,457 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-11-23 16:06:34,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:34,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 16:06:34,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:34,458 INFO L225 Difference]: With dead ends: 97 [2022-11-23 16:06:34,459 INFO L226 Difference]: Without dead ends: 97 [2022-11-23 16:06:34,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:34,460 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 34 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:34,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 98 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 16:06:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-23 16:06:34,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-11-23 16:06:34,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 53 states have (on average 1.9245283018867925) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:34,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2022-11-23 16:06:34,466 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 9 [2022-11-23 16:06:34,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:34,466 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2022-11-23 16:06:34,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2022-11-23 16:06:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 16:06:34,467 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:34,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:34,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 16:06:34,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash 445389526, now seen corresponding path program 1 times [2022-11-23 16:06:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:34,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341408660] [2022-11-23 16:06:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:34,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:34,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:34,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:34,793 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:34,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341408660] [2022-11-23 16:06:34,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341408660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:34,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:34,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:06:34,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695712929] [2022-11-23 16:06:34,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:34,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:06:34,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:34,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:06:34,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:06:34,796 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:35,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:35,095 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2022-11-23 16:06:35,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:06:35,096 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 16:06:35,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:35,097 INFO L225 Difference]: With dead ends: 191 [2022-11-23 16:06:35,097 INFO L226 Difference]: Without dead ends: 191 [2022-11-23 16:06:35,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:06:35,098 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 204 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:35,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 166 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:06:35,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-11-23 16:06:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 122. [2022-11-23 16:06:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 83 states have (on average 1.819277108433735) internal successors, (151), 117 states have internal predecessors, (151), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 155 transitions. [2022-11-23 16:06:35,106 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 155 transitions. Word has length 10 [2022-11-23 16:06:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:35,106 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 155 transitions. [2022-11-23 16:06:35,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 155 transitions. [2022-11-23 16:06:35,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 16:06:35,107 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:35,107 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:35,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 16:06:35,107 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash 445389527, now seen corresponding path program 1 times [2022-11-23 16:06:35,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:35,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276641857] [2022-11-23 16:06:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:35,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:35,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:35,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:35,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276641857] [2022-11-23 16:06:35,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276641857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:35,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:35,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 16:06:35,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33037050] [2022-11-23 16:06:35,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:35,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 16:06:35,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:35,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 16:06:35,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 16:06:35,501 INFO L87 Difference]: Start difference. First operand 122 states and 155 transitions. Second operand has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:35,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:35,859 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2022-11-23 16:06:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 16:06:35,860 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 16:06:35,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:35,862 INFO L225 Difference]: With dead ends: 197 [2022-11-23 16:06:35,862 INFO L226 Difference]: Without dead ends: 197 [2022-11-23 16:06:35,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:06:35,863 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 257 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:35,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 155 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 16:06:35,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-11-23 16:06:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 142. [2022-11-23 16:06:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 103 states have (on average 1.7864077669902914) internal successors, (184), 137 states have internal predecessors, (184), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-23 16:06:35,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 188 transitions. [2022-11-23 16:06:35,870 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 188 transitions. Word has length 10 [2022-11-23 16:06:35,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:35,870 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 188 transitions. [2022-11-23 16:06:35,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:35,870 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 188 transitions. [2022-11-23 16:06:35,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 16:06:35,878 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:35,878 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:35,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 16:06:35,878 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:35,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash -679097844, now seen corresponding path program 1 times [2022-11-23 16:06:35,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:35,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773130141] [2022-11-23 16:06:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:35,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:36,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:36,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773130141] [2022-11-23 16:06:36,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773130141] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:36,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:36,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 16:06:36,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421160770] [2022-11-23 16:06:36,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:36,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 16:06:36,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:36,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 16:06:36,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-11-23 16:06:36,545 INFO L87 Difference]: Start difference. First operand 142 states and 188 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:36,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:36,781 INFO L93 Difference]: Finished difference Result 158 states and 206 transitions. [2022-11-23 16:06:36,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 16:06:36,781 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-23 16:06:36,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:36,783 INFO L225 Difference]: With dead ends: 158 [2022-11-23 16:06:36,783 INFO L226 Difference]: Without dead ends: 158 [2022-11-23 16:06:36,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-11-23 16:06:36,784 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 21 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:36,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 276 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:06:36,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-11-23 16:06:36,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 148. [2022-11-23 16:06:36,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 108 states have (on average 1.75) internal successors, (189), 142 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 16:06:36,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 195 transitions. [2022-11-23 16:06:36,792 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 195 transitions. Word has length 17 [2022-11-23 16:06:36,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:36,793 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 195 transitions. [2022-11-23 16:06:36,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:36,793 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 195 transitions. [2022-11-23 16:06:36,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 16:06:36,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:36,794 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:36,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 16:06:36,795 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash -360261382, now seen corresponding path program 1 times [2022-11-23 16:06:36,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:36,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565202565] [2022-11-23 16:06:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:37,536 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:37,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565202565] [2022-11-23 16:06:37,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565202565] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:37,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:37,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 16:06:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112635566] [2022-11-23 16:06:37,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:37,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 16:06:37,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 16:06:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-23 16:06:37,539 INFO L87 Difference]: Start difference. First operand 148 states and 195 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:37,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:37,794 INFO L93 Difference]: Finished difference Result 152 states and 199 transitions. [2022-11-23 16:06:37,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 16:06:37,795 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-23 16:06:37,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:37,796 INFO L225 Difference]: With dead ends: 152 [2022-11-23 16:06:37,796 INFO L226 Difference]: Without dead ends: 152 [2022-11-23 16:06:37,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-23 16:06:37,797 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 8 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:37,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 306 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 16:06:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-11-23 16:06:37,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 150. [2022-11-23 16:06:37,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 110 states have (on average 1.7363636363636363) internal successors, (191), 144 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 16:06:37,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 197 transitions. [2022-11-23 16:06:37,801 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 197 transitions. Word has length 18 [2022-11-23 16:06:37,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:37,801 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 197 transitions. [2022-11-23 16:06:37,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 16:06:37,802 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 197 transitions. [2022-11-23 16:06:37,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 16:06:37,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:37,802 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:37,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 16:06:37,803 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:37,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:37,803 INFO L85 PathProgramCache]: Analyzing trace with hash -264587606, now seen corresponding path program 1 times [2022-11-23 16:06:37,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:37,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282075443] [2022-11-23 16:06:37,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:37,892 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:37,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282075443] [2022-11-23 16:06:37,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282075443] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 16:06:37,892 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 16:06:37,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 16:06:37,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623491545] [2022-11-23 16:06:37,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 16:06:37,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 16:06:37,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:37,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 16:06:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:37,895 INFO L87 Difference]: Start difference. First operand 150 states and 197 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:06:37,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:37,933 INFO L93 Difference]: Finished difference Result 126 states and 137 transitions. [2022-11-23 16:06:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 16:06:37,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-23 16:06:37,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:37,935 INFO L225 Difference]: With dead ends: 126 [2022-11-23 16:06:37,935 INFO L226 Difference]: Without dead ends: 126 [2022-11-23 16:06:37,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 16:06:37,936 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:37,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 146 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 16:06:37,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-11-23 16:06:37,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 115. [2022-11-23 16:06:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 75 states have (on average 1.5866666666666667) internal successors, (119), 109 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-23 16:06:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2022-11-23 16:06:37,941 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 25 [2022-11-23 16:06:37,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:37,941 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2022-11-23 16:06:37,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 16:06:37,942 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2022-11-23 16:06:37,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 16:06:37,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:37,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:37,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-23 16:06:37,943 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting appendErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:37,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:37,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1012682462, now seen corresponding path program 1 times [2022-11-23 16:06:37,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:37,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103951462] [2022-11-23 16:06:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:37,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:38,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:38,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103951462] [2022-11-23 16:06:38,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103951462] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:06:38,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764320557] [2022-11-23 16:06:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:38,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:06:38,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:06:38,351 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:06:38,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 16:06:38,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:38,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-23 16:06:38,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:06:38,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:06:38,645 WARN L859 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (= |c_#valid| (store |c_old(#valid)| append_~node~0.base 1))) is different from true [2022-11-23 16:06:38,724 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 16:06:38,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:06:38,793 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-23 16:06:38,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:06:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 16:06:38,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:06:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:39,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764320557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 16:06:39,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1325483346] [2022-11-23 16:06:39,089 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-23 16:06:39,090 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:06:39,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:06:39,100 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:06:39,101 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:06:39,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,156 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 16:06:39,185 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:06:39,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,201 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 16:06:39,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:06:39,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-23 16:06:39,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:06:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:06:39,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,303 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 35 [2022-11-23 16:06:39,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 16:06:39,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 16:06:39,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 16:06:39,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,442 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 16:06:39,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 16:06:39,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-23 16:06:39,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:06:39,627 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:06:39,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-23 16:06:39,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:06:39,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:06:39,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:06:39,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:06:39,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:06:39,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-23 16:06:39,792 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-23 16:06:39,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-23 16:06:39,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-23 16:06:39,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,833 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-23 16:06:39,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-23 16:06:39,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-23 16:06:39,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-23 16:06:39,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,952 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 16:06:39,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 16:06:39,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:39,992 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 16:06:39,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-23 16:06:40,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,049 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-23 16:06:40,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 16:06:40,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,108 INFO L321 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-11-23 16:06:40,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2022-11-23 16:06:40,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-23 16:06:40,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,234 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:06:40,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,252 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:06:40,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-23 16:06:40,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,351 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:06:40,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-23 16:06:40,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-23 16:06:40,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:06:40,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,501 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:06:40,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:40,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:06:40,655 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:06:40,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-23 16:06:40,689 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 105 for LOIs [2022-11-23 16:06:42,484 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:06:52,153 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3163#(and (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#NULL.offset| 0) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (not (= (select |#valid| append_~head.base) 1)) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:06:52,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:06:52,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 16:06:52,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 10 [2022-11-23 16:06:52,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756547378] [2022-11-23 16:06:52,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 16:06:52,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 16:06:52,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:06:52,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 16:06:52,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=844, Unknown=1, NotChecked=60, Total=1056 [2022-11-23 16:06:52,157 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 16:06:52,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:06:52,827 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2022-11-23 16:06:52,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 16:06:52,827 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-11-23 16:06:52,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:06:52,828 INFO L225 Difference]: With dead ends: 151 [2022-11-23 16:06:52,829 INFO L226 Difference]: Without dead ends: 151 [2022-11-23 16:06:52,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=242, Invalid=1167, Unknown=1, NotChecked=72, Total=1482 [2022-11-23 16:06:52,830 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 142 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 16:06:52,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 292 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 402 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-11-23 16:06:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-23 16:06:52,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 123. [2022-11-23 16:06:52,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.5542168674698795) internal successors, (129), 117 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-11-23 16:06:52,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 136 transitions. [2022-11-23 16:06:52,835 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 136 transitions. Word has length 27 [2022-11-23 16:06:52,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:06:52,836 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 136 transitions. [2022-11-23 16:06:52,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-23 16:06:52,836 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 136 transitions. [2022-11-23 16:06:52,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-23 16:06:52,837 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:06:52,837 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:06:52,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-23 16:06:53,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:06:53,043 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting appendErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:06:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:06:53,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1012682461, now seen corresponding path program 1 times [2022-11-23 16:06:53,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:06:53,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992414143] [2022-11-23 16:06:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:53,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:06:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:53,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:06:53,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:06:53,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992414143] [2022-11-23 16:06:53,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992414143] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:06:53,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023555550] [2022-11-23 16:06:53,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:06:53,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:06:53,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:06:53,543 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:06:53,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 16:06:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:06:53,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 16:06:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:06:53,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:06:53,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:06:53,795 WARN L859 $PredicateComparison]: unable to prove that (exists ((append_~node~0.base Int)) (and (= (select |c_old(#valid)| append_~node~0.base) 0) (= |c_#valid| (store |c_old(#valid)| append_~node~0.base 1)) (exists ((v_ArrVal_603 Int)) (= (store |c_old(#length)| append_~node~0.base v_ArrVal_603) |c_#length|)))) is different from true [2022-11-23 16:06:53,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:53,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:06:53,937 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:06:53,938 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 16:06:54,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:06:54,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-23 16:06:54,103 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-11-23 16:06:54,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 16:06:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-11-23 16:06:54,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:07:02,336 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 16:07:02,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023555550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:02,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981267499] [2022-11-23 16:07:02,626 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2022-11-23 16:07:02,627 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:07:02,627 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:07:02,627 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:07:02,627 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:07:02,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,647 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 16:07:02,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 16:07:02,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:02,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:02,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-23 16:07:02,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:02,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,743 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 35 [2022-11-23 16:07:02,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 16:07:02,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 16:07:02,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,798 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 16:07:02,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 16:07:02,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-23 16:07:02,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 16:07:02,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:02,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:02,941 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:07:02,941 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-23 16:07:02,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:07:02,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:07:02,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:07:02,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:07:02,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:03,044 INFO L321 Elim1Store]: treesize reduction 21, result has 41.7 percent of original size [2022-11-23 16:07:03,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-11-23 16:07:03,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-23 16:07:03,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,070 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 23 [2022-11-23 16:07:03,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-23 16:07:03,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-23 16:07:03,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 23 [2022-11-23 16:07:03,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,155 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 16:07:03,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 16:07:03,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,189 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 16:07:03,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-23 16:07:03,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-23 16:07:03,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,265 INFO L321 Elim1Store]: treesize reduction 62, result has 30.3 percent of original size [2022-11-23 16:07:03,266 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 64 [2022-11-23 16:07:03,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,312 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-23 16:07:03,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 16:07:03,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2022-11-23 16:07:03,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:03,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-11-23 16:07:03,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:03,504 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:07:03,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-23 16:07:03,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:03,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-11-23 16:07:03,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:03,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:03,696 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:07:03,696 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-23 16:07:03,718 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 102 for LOIs [2022-11-23 16:07:05,221 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:07:16,583 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3592#(and (not (<= (+ append_~head.offset 4) (select |#length| append_~head.base))) (= 0 (select |old(#valid)| append_~node~0.base)) (= |append_#in~head.offset| append_~head.offset) (= |#memory_$Pointer$.offset| (store |old(#memory_$Pointer$.offset)| append_~node~0.base (store (select |old(#memory_$Pointer$.offset)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.offset| append_~node~0.base) append_~node~0.offset)))) (= |#memory_int| (store |old(#memory_int)| append_~node~0.base (store (select |old(#memory_int)| append_~node~0.base) append_~node~0.offset append_~input))) (not (= append_~node~0.base 0)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (< append_~node~0.base |#StackHeapBarrier|) (= (store |old(#length)| append_~node~0.base 9) |#length|) (= |append_#in~head.offset| 0) (= append_~head.base |append_#in~head.base|) (= |#memory_$Pointer$.base| (store |old(#memory_$Pointer$.base)| append_~node~0.base (store (select |old(#memory_$Pointer$.base)| append_~node~0.base) append_~node~0.offset (select (select |#memory_$Pointer$.base| append_~node~0.base) append_~node~0.offset)))) (= |#NULL.offset| 0) (= |#valid| (store |old(#valid)| append_~node~0.base 1)) (= append_~input |append_#in~input|) (<= |append_#in~input| 127) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 16:07:16,587 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:07:16,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:07:16,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2022-11-23 16:07:16,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108014534] [2022-11-23 16:07:16,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:07:16,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 16:07:16,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:16,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 16:07:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1159, Unknown=1, NotChecked=70, Total=1406 [2022-11-23 16:07:16,592 INFO L87 Difference]: Start difference. First operand 123 states and 136 transitions. Second operand has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:07:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:17,721 INFO L93 Difference]: Finished difference Result 288 states and 321 transitions. [2022-11-23 16:07:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 16:07:17,721 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2022-11-23 16:07:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:17,727 INFO L225 Difference]: With dead ends: 288 [2022-11-23 16:07:17,727 INFO L226 Difference]: Without dead ends: 288 [2022-11-23 16:07:17,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=255, Invalid=1640, Unknown=1, NotChecked=84, Total=1980 [2022-11-23 16:07:17,729 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 265 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:17,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 303 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 613 Invalid, 0 Unknown, 178 Unchecked, 0.8s Time] [2022-11-23 16:07:17,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-11-23 16:07:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 170. [2022-11-23 16:07:17,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 127 states have (on average 1.5748031496062993) internal successors, (200), 160 states have internal predecessors, (200), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 16:07:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 212 transitions. [2022-11-23 16:07:17,738 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 212 transitions. Word has length 27 [2022-11-23 16:07:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:17,739 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 212 transitions. [2022-11-23 16:07:17,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 9 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:07:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 212 transitions. [2022-11-23 16:07:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 16:07:17,743 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:17,743 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:17,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 16:07:17,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 16:07:17,947 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting appendErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:07:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:17,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1174362866, now seen corresponding path program 1 times [2022-11-23 16:07:17,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:17,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934677282] [2022-11-23 16:07:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:17,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:19,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:19,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:19,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934677282] [2022-11-23 16:07:19,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934677282] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:19,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879174232] [2022-11-23 16:07:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:19,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:19,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:19,093 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:19,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 16:07:19,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:19,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-23 16:07:19,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:19,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:07:19,326 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:07:19,326 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 16:07:19,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 16:07:19,545 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:07:19,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 16:07:19,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 16:07:19,610 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:07:19,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 26 [2022-11-23 16:07:19,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:19,708 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-23 16:07:19,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 16:07:19,859 INFO L321 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2022-11-23 16:07:19,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2022-11-23 16:07:19,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-23 16:07:20,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-23 16:07:20,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-23 16:07:20,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-23 16:07:20,128 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:20,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:07:20,166 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_780 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_780) c_append_~head.base) (+ c_append_~head.offset 4))) 1)) is different from false [2022-11-23 16:07:20,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:20,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2022-11-23 16:07:20,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 332 treesize of output 206 [2022-11-23 16:07:20,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 182 treesize of output 166 [2022-11-23 16:07:20,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 79 [2022-11-23 16:07:20,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879174232] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:20,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019282926] [2022-11-23 16:07:20,571 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-23 16:07:20,571 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:07:20,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:07:20,572 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:07:20,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:07:20,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,590 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 16:07:20,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:20,615 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:20,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 16:07:20,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:20,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:20,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,672 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 35 [2022-11-23 16:07:20,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-23 16:07:20,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 16:07:20,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 16:07:20,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 16:07:20,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-23 16:07:20,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 16:07:20,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 16:07:20,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:20,868 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:07:20,869 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-23 16:07:20,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:07:20,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:07:20,908 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:07:20,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:20,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:07:20,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:07:20,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:20,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:20,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:20,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:20,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:20,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,015 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 16:07:21,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-23 16:07:21,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:21,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,048 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 16:07:21,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 16:07:21,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:21,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,100 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-23 16:07:21,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 16:07:21,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,164 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-23 16:07:21,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2022-11-23 16:07:21,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-23 16:07:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:21,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:21,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,398 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:07:21,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 45 [2022-11-23 16:07:21,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:21,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,514 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:21,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:21,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-23 16:07:21,773 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-23 16:07:21,774 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-23 16:07:22,154 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 16:07:22,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:22,188 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 16:07:22,188 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:22,201 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:22,232 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:22,260 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:22,267 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:22,385 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:22,589 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-23 16:07:22,589 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-23 16:07:23,318 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:23,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 50 treesize of output 108 [2022-11-23 16:07:23,512 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,518 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,525 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,533 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,541 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,547 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,555 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,562 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,568 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,574 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,580 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,601 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,617 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,622 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,629 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,635 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,660 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,774 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:23,987 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-23 16:07:23,987 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-23 16:07:26,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:26,150 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,158 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:26,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-11-23 16:07:26,211 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,220 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,227 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:26,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:26,270 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:26,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 34 treesize of output 62 [2022-11-23 16:07:26,332 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,356 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,363 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,370 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,381 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,407 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,413 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,422 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,437 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,448 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,457 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,466 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,492 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,501 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,519 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,544 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,557 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,590 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,611 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,618 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,631 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,655 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,683 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,692 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,702 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,710 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:26,784 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:27,046 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-23 16:07:27,047 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-23 16:07:28,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:28,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 67 [2022-11-23 16:07:28,519 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 16:07:28,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:28,527 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:28,535 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:28,541 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:28,549 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:28,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:28,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:28,678 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:28,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 2 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 25 case distinctions, treesize of input 100 treesize of output 236 [2022-11-23 16:07:33,966 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:33,972 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:33,981 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:33,999 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:34,006 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:34,013 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:34,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:34,040 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:34,048 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:34,087 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:34,320 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-23 16:07:34,321 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-23 16:07:34,504 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-23 16:07:34,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:34,510 INFO L197 IcfgInterpreter]: Interpreting procedure append with input of size 113 for LOIs [2022-11-23 16:07:34,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:34,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:34,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:07:34,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:34,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:34,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:34,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 16:07:34,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 16:07:34,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:34,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,957 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:34,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 16:07:34,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:34,978 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:34,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 16:07:34,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:35,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:35,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-23 16:07:35,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:35,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:35,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-23 16:07:35,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:35,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:35,040 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:35,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-23 16:07:35,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:35,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:35,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:35,061 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:35,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-11-23 16:07:35,072 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 16:07:39,029 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4258#(and (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 (+ append_~input 128)) (= append_~node~0.offset 0) (<= 0 (+ 128 |append_#in~input|)) (= (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.offset|) (= (select (select |#memory_$Pointer$.base| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4))) (<= (+ 8 append_~head.offset) (select |#length| append_~head.base)) (<= append_~head.offset 0) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ 5 append_~node~0.offset)) 0) (<= 0 append_~head.offset) (= |append_#in~head.offset| 0) (not (= (select |#valid| |append_#t~mem8.base|) 1)) (= (select (select |#memory_$Pointer$.offset| append_~node~0.base) (+ append_~node~0.offset 1)) (select (select |#memory_$Pointer$.offset| append_~head.base) (+ append_~head.offset 4))) (= |#NULL.offset| 0) (= (select |#valid| append_~head.base) 1) (= (select |#valid| append_~node~0.base) 1) (<= append_~input 127) (<= |append_#in~input| 127) (= (select (select |#memory_$Pointer$.base| append_~head.base) (+ append_~head.offset 4)) |append_#t~mem8.base|) (<= 0 |#StackHeapBarrier|) (<= (+ 9 append_~node~0.offset) (select |#length| append_~node~0.base)) (= |#NULL.base| 0))' at error location [2022-11-23 16:07:39,029 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 16:07:39,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 16:07:39,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 24 [2022-11-23 16:07:39,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868365879] [2022-11-23 16:07:39,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 16:07:39,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-23 16:07:39,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 16:07:39,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-23 16:07:39,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2432, Unknown=1, NotChecked=100, Total=2756 [2022-11-23 16:07:39,033 INFO L87 Difference]: Start difference. First operand 170 states and 212 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:07:40,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 16:07:40,218 INFO L93 Difference]: Finished difference Result 214 states and 267 transitions. [2022-11-23 16:07:40,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 16:07:40,218 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 33 [2022-11-23 16:07:40,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 16:07:40,220 INFO L225 Difference]: With dead ends: 214 [2022-11-23 16:07:40,220 INFO L226 Difference]: Without dead ends: 214 [2022-11-23 16:07:40,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=330, Invalid=3095, Unknown=1, NotChecked=114, Total=3540 [2022-11-23 16:07:40,223 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 270 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 16:07:40,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 478 Invalid, 891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 815 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 16:07:40,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-11-23 16:07:40,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 174. [2022-11-23 16:07:40,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 132 states have (on average 1.5227272727272727) internal successors, (201), 164 states have internal predecessors, (201), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-23 16:07:40,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 213 transitions. [2022-11-23 16:07:40,235 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 213 transitions. Word has length 33 [2022-11-23 16:07:40,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 16:07:40,235 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 213 transitions. [2022-11-23 16:07:40,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 22 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-23 16:07:40,236 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 213 transitions. [2022-11-23 16:07:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 16:07:40,238 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 16:07:40,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 16:07:40,252 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 16:07:40,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:40,445 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting appendErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2022-11-23 16:07:40,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 16:07:40,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1174362867, now seen corresponding path program 1 times [2022-11-23 16:07:40,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 16:07:40,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128688039] [2022-11-23 16:07:40,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:40,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 16:07:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:42,862 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 16:07:42,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128688039] [2022-11-23 16:07:42,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128688039] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:42,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246925803] [2022-11-23 16:07:42,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 16:07:42,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 16:07:42,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 16:07:42,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 16:07:42,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a47b0b4f-edab-4573-bbf0-e5ce9ef7349e/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 16:07:43,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 16:07:43,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 68 conjunts are in the unsatisfiable core [2022-11-23 16:07:43,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 16:07:43,054 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:07:43,081 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 16:07:43,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-23 16:07:43,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 16:07:43,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 16:07:43,465 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:07:43,466 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 16:07:43,484 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:07:43,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-11-23 16:07:43,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 16:07:43,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-23 16:07:43,681 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:07:43,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 46 [2022-11-23 16:07:43,713 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 16:07:43,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 44 [2022-11-23 16:07:43,767 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:43,780 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-11-23 16:07:44,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:44,020 INFO L321 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2022-11-23 16:07:44,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 28 [2022-11-23 16:07:44,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:44,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 16:07:44,313 INFO L321 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2022-11-23 16:07:44,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2022-11-23 16:07:44,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-23 16:07:44,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-23 16:07:44,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-23 16:07:44,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-23 16:07:44,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-11-23 16:07:44,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 35 [2022-11-23 16:07:44,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:44,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-11-23 16:07:44,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:44,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2022-11-23 16:07:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 16:07:44,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 16:07:44,932 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_append_~head.offset 4))) (and (forall ((v_ArrVal_964 (Array Int Int)) (v_ArrVal_965 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_965) c_append_~head.base) .cse0) 9) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| c_append_~node~0.base v_ArrVal_964) c_append_~head.base) .cse0)))) (forall ((v_ArrVal_965 (Array Int Int))) (<= 0 (+ 5 (select (select (store |c_#memory_$Pointer$.offset| c_append_~node~0.base v_ArrVal_965) c_append_~head.base) .cse0)))))) is different from false [2022-11-23 16:07:45,622 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:45,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 103 [2022-11-23 16:07:45,636 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:45,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 113 [2022-11-23 16:07:45,665 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:45,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 481 treesize of output 345 [2022-11-23 16:07:45,687 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:45,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 982 treesize of output 924 [2022-11-23 16:07:45,744 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:45,745 INFO L350 Elim1Store]: Elim1 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 1584 treesize of output 1494 [2022-11-23 16:07:45,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1415 treesize of output 1287 [2022-11-23 16:07:45,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1328 treesize of output 1252 [2022-11-23 16:07:45,824 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1223 treesize of output 1155 [2022-11-23 16:07:45,844 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1192 treesize of output 1052 [2022-11-23 16:07:45,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1027 treesize of output 1019 [2022-11-23 16:07:47,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246925803] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 16:07:47,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1511950615] [2022-11-23 16:07:47,349 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2022-11-23 16:07:47,349 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 16:07:47,350 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 16:07:47,350 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 16:07:47,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 16:07:47,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,371 INFO L350 Elim1Store]: Elim1 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 [2022-11-23 16:07:47,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:47,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 16:07:47,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:47,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,425 INFO L350 Elim1Store]: Elim1 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 29 treesize of output 35 [2022-11-23 16:07:47,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:47,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:47,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-23 16:07:47,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 16:07:47,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-23 16:07:47,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2022-11-23 16:07:47,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 16:07:47,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2022-11-23 16:07:47,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2022-11-23 16:07:47,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:47,638 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:07:47,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-23 16:07:47,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-23 16:07:47,669 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 16:07:47,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:07:47,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:07:47,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:47,725 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:47,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 16:07:47,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-23 16:07:47,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:47,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:47,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 16:07:47,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,778 INFO L321 Elim1Store]: treesize reduction 19, result has 47.2 percent of original size [2022-11-23 16:07:47,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 42 [2022-11-23 16:07:47,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:47,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,807 INFO L321 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2022-11-23 16:07:47,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 16:07:47,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,844 INFO L321 Elim1Store]: treesize reduction 72, result has 19.1 percent of original size [2022-11-23 16:07:47,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 44 [2022-11-23 16:07:47,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2022-11-23 16:07:47,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,926 INFO L321 Elim1Store]: treesize reduction 52, result has 41.6 percent of original size [2022-11-23 16:07:47,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 74 [2022-11-23 16:07:47,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:47,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-23 16:07:48,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:48,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:48,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 16:07:48,147 INFO L321 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-11-23 16:07:48,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 40 [2022-11-23 16:07:48,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2022-11-23 16:07:48,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 16:07:48,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2022-11-23 16:07:48,502 INFO L321 Elim1Store]: treesize reduction 83, result has 54.1 percent of original size [2022-11-23 16:07:48,502 INFO L350 Elim1Store]: Elim1 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 6 new quantified variables, introduced 12 case distinctions, treesize of input 199 treesize of output 286 [2022-11-23 16:07:50,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 16:07:50,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 4 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 193 treesize of output 641 [2022-11-23 16:12:11,861 WARN L233 SmtUtils]: Spent 15.31s on a formula simplification. DAG size of input: 4953 DAG size of output: 4939 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-11-23 16:15:23,999 WARN L233 SmtUtils]: Spent 8.79s on a formula simplification. DAG size of input: 5552 DAG size of output: 5551 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)