./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V --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 2f737570030041640fd86c7d2770b30b4e6ee4ac0d1c521887700aab87fb1426 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:50:15,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:50:15,722 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:50:15,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:50:15,758 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:50:15,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:50:15,761 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:50:15,764 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:50:15,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:50:15,767 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:50:15,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:50:15,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:50:15,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:50:15,773 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:50:15,775 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:50:15,776 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:50:15,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:50:15,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:50:15,782 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:50:15,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:50:15,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:50:15,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:50:15,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:50:15,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:50:15,796 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:50:15,796 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:50:15,797 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:50:15,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:50:15,799 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:50:15,800 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:50:15,801 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:50:15,802 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:50:15,803 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:50:15,804 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:50:15,805 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:50:15,806 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:50:15,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:50:15,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:50:15,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:50:15,810 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:50:15,811 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:50:15,812 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:50:15,841 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:50:15,841 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:50:15,842 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:50:15,842 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:50:15,843 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:50:15,844 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:50:15,844 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:50:15,845 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:50:15,845 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:50:15,846 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:50:15,846 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:50:15,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:50:15,847 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:50:15,847 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:50:15,848 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:50:15,848 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:50:15,849 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:50:15,849 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:50:15,850 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:50:15,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:50:15,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:50:15,851 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:50:15,852 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:50:15,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:50:15,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:50:15,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:50:15,853 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:50:15,853 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:50:15,854 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:50:15,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:50:15,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:50:15,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:50:15,855 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:50:15,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:50:15,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:50:15,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:50:15,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:50:15,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:50:15,857 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:50:15,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:50:15,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:50:15,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:50:15,858 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f737570030041640fd86c7d2770b30b4e6ee4ac0d1c521887700aab87fb1426 [2021-11-23 03:50:16,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:50:16,197 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:50:16,200 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:50:16,202 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:50:16,203 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:50:16,204 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-2.i [2021-11-23 03:50:16,286 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data/74f7bd537/716a677f01c9427e9c3dabc6fe15c3e3/FLAG181fcceb3 [2021-11-23 03:50:16,872 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:50:16,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-2.i [2021-11-23 03:50:16,895 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data/74f7bd537/716a677f01c9427e9c3dabc6fe15c3e3/FLAG181fcceb3 [2021-11-23 03:50:17,143 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data/74f7bd537/716a677f01c9427e9c3dabc6fe15c3e3 [2021-11-23 03:50:17,146 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:50:17,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:50:17,150 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:17,150 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:50:17,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:50:17,155 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1763fa38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17, skipping insertion in model container [2021-11-23 03:50:17,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:50:17,224 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:50:17,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:17,573 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:50:17,631 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:50:17,662 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:50:17,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17 WrapperNode [2021-11-23 03:50:17,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:50:17,664 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:50:17,664 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:50:17,664 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:50:17,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,689 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,726 INFO L137 Inliner]: procedures = 116, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 124 [2021-11-23 03:50:17,727 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:50:17,727 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:50:17,728 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:50:17,728 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:50:17,737 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,742 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,753 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:50:17,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:50:17,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:50:17,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:50:17,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (1/1) ... [2021-11-23 03:50:17,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:50:17,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:17,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:50:17,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:50:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-23 03:50:17,884 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-23 03:50:17,884 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:50:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:50:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:50:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:50:17,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:50:17,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:50:17,975 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:50:17,977 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:50:18,022 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-23 03:50:18,421 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:50:18,461 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:50:18,462 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:50:18,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:18 BoogieIcfgContainer [2021-11-23 03:50:18,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:50:18,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:50:18,470 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:50:18,474 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:50:18,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:50:17" (1/3) ... [2021-11-23 03:50:18,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a96c796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:50:18, skipping insertion in model container [2021-11-23 03:50:18,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:50:17" (2/3) ... [2021-11-23 03:50:18,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a96c796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:50:18, skipping insertion in model container [2021-11-23 03:50:18,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:18" (3/3) ... [2021-11-23 03:50:18,477 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-2.i [2021-11-23 03:50:18,482 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:50:18,482 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-11-23 03:50:18,534 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:50:18,542 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:50:18,542 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-11-23 03:50:18,562 INFO L276 IsEmpty]: Start isEmpty. Operand has 125 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 123 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:18,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:50:18,570 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:18,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:50:18,571 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:18,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:18,578 INFO L85 PathProgramCache]: Analyzing trace with hash 212800, now seen corresponding path program 1 times [2021-11-23 03:50:18,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:18,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120341301] [2021-11-23 03:50:18,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:18,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:18,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:18,745 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:18,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120341301] [2021-11-23 03:50:18,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120341301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:18,747 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:18,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:50:18,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986920623] [2021-11-23 03:50:18,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:18,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:18,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:18,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:18,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:18,790 INFO L87 Difference]: Start difference. First operand has 125 states, 63 states have (on average 2.0634920634920637) internal successors, (130), 123 states have internal predecessors, (130), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:18,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:18,955 INFO L93 Difference]: Finished difference Result 122 states and 129 transitions. [2021-11-23 03:50:18,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:18,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 03:50:18,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:18,969 INFO L225 Difference]: With dead ends: 122 [2021-11-23 03:50:18,970 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 03:50:18,972 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:50:18,976 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 44 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:18,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 154 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:18,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 03:50:19,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2021-11-23 03:50:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 2.0) internal successors, (122), 116 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2021-11-23 03:50:19,053 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 3 [2021-11-23 03:50:19,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:19,054 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2021-11-23 03:50:19,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2021-11-23 03:50:19,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-11-23 03:50:19,055 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:19,055 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-11-23 03:50:19,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:50:19,056 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash 212801, now seen corresponding path program 1 times [2021-11-23 03:50:19,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:19,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893949939] [2021-11-23 03:50:19,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:19,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:19,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893949939] [2021-11-23 03:50:19,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893949939] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:19,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:19,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-23 03:50:19,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314698487] [2021-11-23 03:50:19,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:19,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:19,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:19,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:19,114 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:19,159 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-11-23 03:50:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:19,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2021-11-23 03:50:19,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:19,162 INFO L225 Difference]: With dead ends: 114 [2021-11-23 03:50:19,162 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 03:50:19,163 INFO L932 BasicCegarLoop]: 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 [2021-11-23 03:50:19,165 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 116 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:19,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 102 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 03:50:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-23 03:50:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 113 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-11-23 03:50:19,179 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 3 [2021-11-23 03:50:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:19,180 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-11-23 03:50:19,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,180 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-11-23 03:50:19,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:50:19,181 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:19,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:19,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:50:19,182 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1038421237, now seen corresponding path program 1 times [2021-11-23 03:50:19,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:19,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744297705] [2021-11-23 03:50:19,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:19,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:19,229 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:19,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744297705] [2021-11-23 03:50:19,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744297705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:19,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:19,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:50:19,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589497555] [2021-11-23 03:50:19,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:19,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:19,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:19,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:19,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:19,233 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:19,258 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2021-11-23 03:50:19,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:19,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:50:19,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:19,261 INFO L225 Difference]: With dead ends: 122 [2021-11-23 03:50:19,261 INFO L226 Difference]: Without dead ends: 122 [2021-11-23 03:50:19,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:19,264 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 7 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:19,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 220 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-23 03:50:19,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2021-11-23 03:50:19,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 62 states have (on average 1.935483870967742) internal successors, (120), 114 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2021-11-23 03:50:19,277 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 7 [2021-11-23 03:50:19,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:19,278 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2021-11-23 03:50:19,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2021-11-23 03:50:19,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:50:19,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:19,279 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:19,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:50:19,280 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:19,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1038579226, now seen corresponding path program 1 times [2021-11-23 03:50:19,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:19,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417703474] [2021-11-23 03:50:19,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:19,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:19,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:19,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417703474] [2021-11-23 03:50:19,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417703474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:19,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:19,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:50:19,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325966898] [2021-11-23 03:50:19,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:19,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:19,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:19,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:19,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:19,327 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:19,436 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-11-23 03:50:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:19,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:50:19,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:19,446 INFO L225 Difference]: With dead ends: 114 [2021-11-23 03:50:19,446 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 03:50:19,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:19,451 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 35 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:19,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 149 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:19,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 03:50:19,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-23 03:50:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 113 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-11-23 03:50:19,481 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 7 [2021-11-23 03:50:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:19,485 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-11-23 03:50:19,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,485 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-11-23 03:50:19,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 03:50:19,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:19,486 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:19,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:50:19,487 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:19,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:19,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1038579225, now seen corresponding path program 1 times [2021-11-23 03:50:19,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:19,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899963982] [2021-11-23 03:50:19,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:19,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:19,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:19,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:19,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899963982] [2021-11-23 03:50:19,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899963982] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:19,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:19,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:50:19,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889081384] [2021-11-23 03:50:19,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:19,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:19,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:19,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:19,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:19,576 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:19,619 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-11-23 03:50:19,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:19,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 03:50:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:19,623 INFO L225 Difference]: With dead ends: 113 [2021-11-23 03:50:19,624 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 03:50:19,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:19,636 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 111 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:19,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 104 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:19,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 03:50:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-23 03:50:19,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 62 states have (on average 1.903225806451613) internal successors, (118), 112 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2021-11-23 03:50:19,650 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 7 [2021-11-23 03:50:19,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:19,655 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2021-11-23 03:50:19,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,655 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2021-11-23 03:50:19,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:50:19,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:19,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:19,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:50:19,656 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:19,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:19,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2131184923, now seen corresponding path program 1 times [2021-11-23 03:50:19,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:19,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753921738] [2021-11-23 03:50:19,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:19,658 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:19,790 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:19,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753921738] [2021-11-23 03:50:19,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753921738] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:19,791 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:19,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:50:19,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44932128] [2021-11-23 03:50:19,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:19,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:50:19,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:19,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:50:19,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:19,794 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:19,916 INFO L93 Difference]: Finished difference Result 117 states and 122 transitions. [2021-11-23 03:50:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:50:19,917 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 8 [2021-11-23 03:50:19,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:19,918 INFO L225 Difference]: With dead ends: 117 [2021-11-23 03:50:19,918 INFO L226 Difference]: Without dead ends: 117 [2021-11-23 03:50:19,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:50:19,919 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 98 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:19,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 195 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:19,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-11-23 03:50:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-11-23 03:50:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.876923076923077) internal successors, (122), 115 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 122 transitions. [2021-11-23 03:50:19,929 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 122 transitions. Word has length 8 [2021-11-23 03:50:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:19,929 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 122 transitions. [2021-11-23 03:50:19,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:19,930 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 122 transitions. [2021-11-23 03:50:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 03:50:19,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:19,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:19,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:50:19,931 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:19,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -2131184922, now seen corresponding path program 1 times [2021-11-23 03:50:19,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:19,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072534711] [2021-11-23 03:50:19,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:19,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:20,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:20,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072534711] [2021-11-23 03:50:20,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072534711] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:20,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:20,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:50:20,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756060000] [2021-11-23 03:50:20,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:20,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:50:20,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:50:20,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:50:20,048 INFO L87 Difference]: Start difference. First operand 116 states and 122 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:20,238 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2021-11-23 03:50:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:50:20,239 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 8 [2021-11-23 03:50:20,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:20,240 INFO L225 Difference]: With dead ends: 116 [2021-11-23 03:50:20,240 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 03:50:20,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:50:20,242 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 116 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:20,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 301 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 03:50:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-23 03:50:20,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 65 states have (on average 1.8615384615384616) internal successors, (121), 115 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2021-11-23 03:50:20,264 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 8 [2021-11-23 03:50:20,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:20,264 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2021-11-23 03:50:20,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,265 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2021-11-23 03:50:20,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:50:20,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:20,266 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:20,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:50:20,266 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:20,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:20,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1918844788, now seen corresponding path program 1 times [2021-11-23 03:50:20,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:20,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079161976] [2021-11-23 03:50:20,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:20,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:20,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:20,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:20,358 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:20,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079161976] [2021-11-23 03:50:20,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079161976] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:20,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:20,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:50:20,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736730163] [2021-11-23 03:50:20,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:20,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:50:20,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:50:20,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:50:20,365 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:20,449 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-11-23 03:50:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:50:20,454 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:50:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:20,455 INFO L225 Difference]: With dead ends: 114 [2021-11-23 03:50:20,455 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 03:50:20,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:20,457 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 61 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:20,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 198 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 03:50:20,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-23 03:50:20,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 65 states have (on average 1.8307692307692307) internal successors, (119), 113 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-11-23 03:50:20,476 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 11 [2021-11-23 03:50:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:20,476 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-11-23 03:50:20,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:20,477 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-11-23 03:50:20,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 03:50:20,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:20,478 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:20,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:50:20,478 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:20,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:20,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1918844787, now seen corresponding path program 1 times [2021-11-23 03:50:20,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:20,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105994195] [2021-11-23 03:50:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:20,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:20,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:20,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:20,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105994195] [2021-11-23 03:50:20,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105994195] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:20,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733970786] [2021-11-23 03:50:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:20,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:20,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:20,557 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:20,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:50:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:20,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:50:20,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:20,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:20,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:20,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733970786] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:20,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1197097967] [2021-11-23 03:50:20,839 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-11-23 03:50:20,840 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:20,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:20,851 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:20,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:20,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:20,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:20,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:21,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,020 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:21,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:21,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:50:21,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:50:21,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:50:21,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:50:21,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:50:21,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-11-23 03:50:21,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:21,583 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 03:50:21,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 333 treesize of output 313 [2021-11-23 03:50:21,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:21,646 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 03:50:21,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 329 treesize of output 324 [2021-11-23 03:50:21,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:21,876 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 03:50:21,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 448 treesize of output 410 [2021-11-23 03:50:21,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:21,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:21,994 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 03:50:21,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 385 [2021-11-23 03:50:22,231 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 03:50:22,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 411 treesize of output 403 [2021-11-23 03:50:22,462 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:22,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:22,499 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 03:50:22,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 333 treesize of output 313 [2021-11-23 03:50:22,522 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:22,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:22,561 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 03:50:22,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 329 treesize of output 324 [2021-11-23 03:50:22,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:22,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:22,870 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 03:50:22,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 448 treesize of output 389 [2021-11-23 03:50:22,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:22,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:22,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:22,979 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 03:50:22,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 445 treesize of output 407 [2021-11-23 03:50:23,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:23,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:23,297 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 03:50:23,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 411 treesize of output 399 [2021-11-23 03:50:23,448 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:24,981 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2082#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (<= |#NULL.offset| 0) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (< (select |#length| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 8)) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |#NULL.base| 0))' at error location [2021-11-23 03:50:24,981 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:24,981 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:24,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2021-11-23 03:50:24,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782308046] [2021-11-23 03:50:24,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:24,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:50:24,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:24,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:50:24,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:50:24,983 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:25,006 INFO L93 Difference]: Finished difference Result 115 states and 120 transitions. [2021-11-23 03:50:25,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:50:25,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-23 03:50:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:25,007 INFO L225 Difference]: With dead ends: 115 [2021-11-23 03:50:25,007 INFO L226 Difference]: Without dead ends: 115 [2021-11-23 03:50:25,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:50:25,011 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 10 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:25,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 314 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:25,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-23 03:50:25,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-11-23 03:50:25,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 66 states have (on average 1.8181818181818181) internal successors, (120), 114 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 120 transitions. [2021-11-23 03:50:25,015 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 120 transitions. Word has length 11 [2021-11-23 03:50:25,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:25,016 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 120 transitions. [2021-11-23 03:50:25,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:25,016 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 120 transitions. [2021-11-23 03:50:25,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 03:50:25,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:25,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:25,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:25,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-23 03:50:25,237 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:25,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:25,237 INFO L85 PathProgramCache]: Analyzing trace with hash 640456069, now seen corresponding path program 1 times [2021-11-23 03:50:25,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:25,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268801578] [2021-11-23 03:50:25,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:25,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:25,347 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:25,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268801578] [2021-11-23 03:50:25,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268801578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:25,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800698200] [2021-11-23 03:50:25,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:25,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:25,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:25,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:25,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:50:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:50:25,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:25,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:25,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:25,498 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:50:25,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 03:50:25,507 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:50:25,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2021-11-23 03:50:25,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:25,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:25,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800698200] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:25,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [378111459] [2021-11-23 03:50:25,747 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-11-23 03:50:25,747 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:25,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:25,748 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:25,748 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:25,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:25,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:25,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:25,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:50:25,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:50:25,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:50:25,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,952 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-11-23 03:50:25,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 84 [2021-11-23 03:50:25,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:25,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 63 [2021-11-23 03:50:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2021-11-23 03:50:26,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,115 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:50:26,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 362 treesize of output 306 [2021-11-23 03:50:26,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,162 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 03:50:26,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 358 treesize of output 353 [2021-11-23 03:50:26,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,352 INFO L354 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2021-11-23 03:50:26,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 458 treesize of output 384 [2021-11-23 03:50:26,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,446 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 03:50:26,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 401 treesize of output 365 [2021-11-23 03:50:26,614 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 03:50:26,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 398 treesize of output 394 [2021-11-23 03:50:26,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,831 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:50:26,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 362 treesize of output 306 [2021-11-23 03:50:26,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:26,876 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 03:50:26,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 358 treesize of output 353 [2021-11-23 03:50:26,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:26,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:27,078 INFO L354 Elim1Store]: treesize reduction 216, result has 15.3 percent of original size [2021-11-23 03:50:27,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 458 treesize of output 384 [2021-11-23 03:50:27,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:27,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:27,161 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 03:50:27,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 401 treesize of output 365 [2021-11-23 03:50:27,357 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 03:50:27,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 398 treesize of output 388 [2021-11-23 03:50:27,500 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:28,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [378111459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:28,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:28,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 15 [2021-11-23 03:50:28,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427231646] [2021-11-23 03:50:28,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:28,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:50:28,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:28,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:50:28,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-11-23 03:50:28,806 INFO L87 Difference]: Start difference. First operand 115 states and 120 transitions. Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:29,329 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-11-23 03:50:29,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:50:29,329 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-23 03:50:29,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:29,330 INFO L225 Difference]: With dead ends: 114 [2021-11-23 03:50:29,330 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 03:50:29,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:50:29,331 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 215 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:29,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 189 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:50:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 03:50:29,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-23 03:50:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 66 states have (on average 1.803030303030303) internal successors, (119), 113 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2021-11-23 03:50:29,336 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 12 [2021-11-23 03:50:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:29,336 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2021-11-23 03:50:29,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2021-11-23 03:50:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:50:29,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:29,338 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:29,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:29,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:29,553 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:29,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1586619790, now seen corresponding path program 2 times [2021-11-23 03:50:29,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:29,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611229645] [2021-11-23 03:50:29,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:29,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:29,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:29,641 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:29,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611229645] [2021-11-23 03:50:29,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611229645] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:29,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:29,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:50:29,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529906534] [2021-11-23 03:50:29,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:29,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:50:29,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:29,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:50:29,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:50:29,644 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:29,679 INFO L93 Difference]: Finished difference Result 113 states and 118 transitions. [2021-11-23 03:50:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:50:29,680 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 03:50:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:29,681 INFO L225 Difference]: With dead ends: 113 [2021-11-23 03:50:29,681 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 03:50:29,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:29,683 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 211 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:29,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 103 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 03:50:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-11-23 03:50:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 66 states have (on average 1.7878787878787878) internal successors, (118), 112 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2021-11-23 03:50:29,687 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 15 [2021-11-23 03:50:29,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:29,688 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2021-11-23 03:50:29,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,688 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2021-11-23 03:50:29,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:50:29,690 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:29,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:29,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:50:29,690 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1940577477, now seen corresponding path program 1 times [2021-11-23 03:50:29,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:29,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479401644] [2021-11-23 03:50:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:29,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:50:29,755 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:29,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479401644] [2021-11-23 03:50:29,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479401644] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:29,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:29,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:50:29,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228566891] [2021-11-23 03:50:29,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:29,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:29,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:29,757 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:29,811 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2021-11-23 03:50:29,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:29,811 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2021-11-23 03:50:29,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:29,812 INFO L225 Difference]: With dead ends: 110 [2021-11-23 03:50:29,813 INFO L226 Difference]: Without dead ends: 110 [2021-11-23 03:50:29,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:29,814 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 22 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:29,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 139 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:29,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-23 03:50:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-11-23 03:50:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.7424242424242424) internal successors, (115), 109 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2021-11-23 03:50:29,818 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 16 [2021-11-23 03:50:29,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:29,819 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2021-11-23 03:50:29,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,819 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2021-11-23 03:50:29,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:50:29,820 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:29,820 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:29,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:50:29,820 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:29,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:29,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1940577478, now seen corresponding path program 1 times [2021-11-23 03:50:29,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:29,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917445620] [2021-11-23 03:50:29,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:29,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:29,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:29,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:29,876 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:29,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917445620] [2021-11-23 03:50:29,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917445620] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:29,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:29,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:50:29,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566122850] [2021-11-23 03:50:29,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:29,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:50:29,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:29,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:50:29,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:29,879 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:29,967 INFO L93 Difference]: Finished difference Result 103 states and 108 transitions. [2021-11-23 03:50:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:50:29,986 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 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 16 [2021-11-23 03:50:29,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:29,987 INFO L225 Difference]: With dead ends: 103 [2021-11-23 03:50:29,988 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 03:50:29,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:50:29,989 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 283 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:29,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 72 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 03:50:29,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-11-23 03:50:29,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 66 states have (on average 1.6363636363636365) internal successors, (108), 102 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2021-11-23 03:50:29,995 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 16 [2021-11-23 03:50:29,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:29,995 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2021-11-23 03:50:29,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2021-11-23 03:50:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:50:29,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:29,997 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:29,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:50:29,997 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:29,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:29,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1116060269, now seen corresponding path program 1 times [2021-11-23 03:50:29,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:29,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805149680] [2021-11-23 03:50:29,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:29,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:30,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:30,074 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:30,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805149680] [2021-11-23 03:50:30,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805149680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:30,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:30,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:50:30,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718794633] [2021-11-23 03:50:30,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:30,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:50:30,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:50:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:50:30,080 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:30,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:30,170 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2021-11-23 03:50:30,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:50:30,171 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 03:50:30,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:30,172 INFO L225 Difference]: With dead ends: 98 [2021-11-23 03:50:30,172 INFO L226 Difference]: Without dead ends: 98 [2021-11-23 03:50:30,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:50:30,173 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 264 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:30,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 62 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-23 03:50:30,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-11-23 03:50:30,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.5606060606060606) internal successors, (103), 97 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 103 transitions. [2021-11-23 03:50:30,185 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 103 transitions. Word has length 20 [2021-11-23 03:50:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:30,186 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 103 transitions. [2021-11-23 03:50:30,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 103 transitions. [2021-11-23 03:50:30,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:50:30,187 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:30,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:30,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 03:50:30,187 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:30,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:30,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1116021287, now seen corresponding path program 1 times [2021-11-23 03:50:30,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:30,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367645552] [2021-11-23 03:50:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:30,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:30,294 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:30,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367645552] [2021-11-23 03:50:30,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367645552] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:30,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:30,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:50:30,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692533154] [2021-11-23 03:50:30,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:30,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:50:30,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:50:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:50:30,297 INFO L87 Difference]: Start difference. First operand 98 states and 103 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:30,381 INFO L93 Difference]: Finished difference Result 93 states and 98 transitions. [2021-11-23 03:50:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:50:30,382 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 03:50:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:30,383 INFO L225 Difference]: With dead ends: 93 [2021-11-23 03:50:30,383 INFO L226 Difference]: Without dead ends: 93 [2021-11-23 03:50:30,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:50:30,384 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 333 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:30,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 62 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:30,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-23 03:50:30,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-11-23 03:50:30,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 92 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:30,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 98 transitions. [2021-11-23 03:50:30,388 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 98 transitions. Word has length 20 [2021-11-23 03:50:30,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:30,389 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 98 transitions. [2021-11-23 03:50:30,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:30,389 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 98 transitions. [2021-11-23 03:50:30,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:50:30,390 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:30,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:30,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 03:50:30,391 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:30,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:30,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1116022503, now seen corresponding path program 1 times [2021-11-23 03:50:30,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:30,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307692903] [2021-11-23 03:50:30,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:30,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:30,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:30,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:30,564 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:30,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307692903] [2021-11-23 03:50:30,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307692903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:30,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430910407] [2021-11-23 03:50:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:30,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:30,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:30,569 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:30,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:50:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:30,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-23 03:50:30,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:30,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:30,825 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:50:30,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 03:50:30,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:30,962 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:50:30,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 03:50:31,058 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-23 03:50:31,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:50:31,142 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:50:31,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 46 [2021-11-23 03:50:31,247 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-11-23 03:50:31,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 24 [2021-11-23 03:50:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:31,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:31,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430910407] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:31,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [582554856] [2021-11-23 03:50:31,903 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2021-11-23 03:50:31,903 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:31,903 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:31,904 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:31,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:31,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:31,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:31,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:31,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:31,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:31,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:31,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:32,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:50:32,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:50:32,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:50:32,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,117 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 03:50:32,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 84 [2021-11-23 03:50:32,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,135 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-23 03:50:32,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2021-11-23 03:50:32,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 03:50:32,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:32,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:32,291 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 03:50:32,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 342 treesize of output 329 [2021-11-23 03:50:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:32,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:32,341 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 03:50:32,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 338 treesize of output 342 [2021-11-23 03:50:32,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:32,437 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:32,540 INFO L354 Elim1Store]: treesize reduction 238, result has 16.2 percent of original size [2021-11-23 03:50:32,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 458 [2021-11-23 03:50:32,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:32,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:32,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:32,648 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 03:50:32,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 385 [2021-11-23 03:50:32,851 INFO L354 Elim1Store]: treesize reduction 188, result has 10.0 percent of original size [2021-11-23 03:50:32,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 417 [2021-11-23 03:50:33,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:33,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:33,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:33,072 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 03:50:33,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 342 treesize of output 346 [2021-11-23 03:50:33,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:33,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:33,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:33,121 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 03:50:33,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 338 treesize of output 325 [2021-11-23 03:50:33,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:33,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:33,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:33,327 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 03:50:33,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 389 [2021-11-23 03:50:33,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:33,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:33,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:33,423 INFO L354 Elim1Store]: treesize reduction 246, result has 13.4 percent of original size [2021-11-23 03:50:33,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 487 treesize of output 455 [2021-11-23 03:50:33,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:33,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:33,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:33,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:33,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:33,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:33,868 INFO L354 Elim1Store]: treesize reduction 182, result has 12.9 percent of original size [2021-11-23 03:50:33,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 473 treesize of output 456 [2021-11-23 03:50:33,969 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:36,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3849#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0)) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) 1) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:50:36,911 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:36,911 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:36,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 24 [2021-11-23 03:50:36,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780065709] [2021-11-23 03:50:36,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:36,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 03:50:36,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:36,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 03:50:36,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1264, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 03:50:36,914 INFO L87 Difference]: Start difference. First operand 93 states and 98 transitions. Second operand has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:37,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:37,467 INFO L93 Difference]: Finished difference Result 97 states and 103 transitions. [2021-11-23 03:50:37,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 03:50:37,468 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 03:50:37,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:37,469 INFO L225 Difference]: With dead ends: 97 [2021-11-23 03:50:37,469 INFO L226 Difference]: Without dead ends: 97 [2021-11-23 03:50:37,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=320, Invalid=1842, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 03:50:37,471 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 89 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:37,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 905 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 169 Invalid, 0 Unknown, 105 Unchecked, 0.1s Time] [2021-11-23 03:50:37,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-23 03:50:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2021-11-23 03:50:37,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 66 states have (on average 1.4242424242424243) internal successors, (94), 88 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:37,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 94 transitions. [2021-11-23 03:50:37,477 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 94 transitions. Word has length 20 [2021-11-23 03:50:37,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:37,478 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 94 transitions. [2021-11-23 03:50:37,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:37,478 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 94 transitions. [2021-11-23 03:50:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:50:37,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:37,481 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:37,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:37,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 03:50:37,697 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:37,697 INFO L85 PathProgramCache]: Analyzing trace with hash -236921349, now seen corresponding path program 1 times [2021-11-23 03:50:37,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:37,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303285259] [2021-11-23 03:50:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:37,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:37,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:37,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:37,866 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:37,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303285259] [2021-11-23 03:50:37,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303285259] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:37,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:37,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 03:50:37,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137200176] [2021-11-23 03:50:37,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:37,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:50:37,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:37,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:50:37,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:50:37,870 INFO L87 Difference]: Start difference. First operand 89 states and 94 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:38,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:38,019 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2021-11-23 03:50:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:50:38,019 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 21 [2021-11-23 03:50:38,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:38,020 INFO L225 Difference]: With dead ends: 84 [2021-11-23 03:50:38,020 INFO L226 Difference]: Without dead ends: 84 [2021-11-23 03:50:38,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:50:38,021 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 294 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:38,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 29 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-23 03:50:38,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-11-23 03:50:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 66 states have (on average 1.3484848484848484) internal successors, (89), 83 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:38,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2021-11-23 03:50:38,024 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 21 [2021-11-23 03:50:38,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:38,025 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2021-11-23 03:50:38,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:38,025 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2021-11-23 03:50:38,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:50:38,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:38,026 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:38,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 03:50:38,026 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:38,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:38,026 INFO L85 PathProgramCache]: Analyzing trace with hash -236959083, now seen corresponding path program 1 times [2021-11-23 03:50:38,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:38,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083264306] [2021-11-23 03:50:38,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:38,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:38,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:38,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083264306] [2021-11-23 03:50:38,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083264306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:38,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631315883] [2021-11-23 03:50:38,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:38,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:38,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:38,253 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:38,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:50:38,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:38,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-23 03:50:38,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:38,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:38,398 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:50:38,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 03:50:38,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:38,470 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:50:38,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 29 [2021-11-23 03:50:38,542 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:50:38,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-11-23 03:50:38,643 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 03:50:38,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 56 [2021-11-23 03:50:38,735 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 03:50:38,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 29 [2021-11-23 03:50:38,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:38,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:47,864 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 03:50:47,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 51 [2021-11-23 03:50:47,879 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:50:47,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 67 [2021-11-23 03:50:47,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:50:48,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:50:48,040 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:50:48,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 03:50:48,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:50:48,225 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:50:48,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 91 treesize of output 177 [2021-11-23 03:50:48,901 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:50:48,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2021-11-23 03:50:48,933 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:48,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631315883] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:48,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1753055522] [2021-11-23 03:50:48,939 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 03:50:48,939 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:48,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:48,940 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:48,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:48,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:48,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:48,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:49,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:49,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:49,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:50:49,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:50:49,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:50:49,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,146 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 03:50:49,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 84 [2021-11-23 03:50:49,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,165 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-23 03:50:49,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2021-11-23 03:50:49,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 03:50:49,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:49,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,297 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:49,334 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 03:50:49,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 342 treesize of output 329 [2021-11-23 03:50:49,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:49,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:49,387 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 03:50:49,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 338 treesize of output 342 [2021-11-23 03:50:49,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:49,489 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:49,628 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 03:50:49,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 389 [2021-11-23 03:50:49,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:49,647 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:49,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:49,743 INFO L354 Elim1Store]: treesize reduction 246, result has 13.4 percent of original size [2021-11-23 03:50:49,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 487 treesize of output 455 [2021-11-23 03:50:49,908 INFO L354 Elim1Store]: treesize reduction 184, result has 12.0 percent of original size [2021-11-23 03:50:49,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 473 treesize of output 454 [2021-11-23 03:50:50,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:50,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:50,127 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 03:50:50,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 342 treesize of output 346 [2021-11-23 03:50:50,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:50,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:50,181 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 03:50:50,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 338 treesize of output 325 [2021-11-23 03:50:50,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:50,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:50,399 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 03:50:50,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 482 treesize of output 389 [2021-11-23 03:50:50,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:50,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:50,514 INFO L354 Elim1Store]: treesize reduction 238, result has 16.2 percent of original size [2021-11-23 03:50:50,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 471 treesize of output 447 [2021-11-23 03:50:50,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:50,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:50,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:50,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:50,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:50,917 INFO L354 Elim1Store]: treesize reduction 186, result has 11.0 percent of original size [2021-11-23 03:50:50,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 419 [2021-11-23 03:50:51,002 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:50:54,628 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4387#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) 1) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= |#StackHeapBarrier| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:50:54,628 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:50:54,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:50:54,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2021-11-23 03:50:54,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830882729] [2021-11-23 03:50:54,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:54,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 03:50:54,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:54,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 03:50:54,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1099, Unknown=4, NotChecked=0, Total=1260 [2021-11-23 03:50:54,630 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:54,943 INFO L93 Difference]: Finished difference Result 126 states and 135 transitions. [2021-11-23 03:50:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:50:54,944 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 03:50:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:54,945 INFO L225 Difference]: With dead ends: 126 [2021-11-23 03:50:54,945 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 03:50:54,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=164, Invalid=1164, Unknown=4, NotChecked=0, Total=1332 [2021-11-23 03:50:54,947 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 68 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:54,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 598 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 404 Invalid, 0 Unknown, 197 Unchecked, 0.3s Time] [2021-11-23 03:50:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 03:50:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 116. [2021-11-23 03:50:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 98 states have (on average 1.316326530612245) internal successors, (129), 115 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2021-11-23 03:50:54,951 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 21 [2021-11-23 03:50:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:54,951 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2021-11-23 03:50:54,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2021-11-23 03:50:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:50:54,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:54,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:54,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:55,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 03:50:55,165 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:55,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:55,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1245372955, now seen corresponding path program 1 times [2021-11-23 03:50:55,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:55,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960323307] [2021-11-23 03:50:55,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:55,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:55,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:55,340 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:55,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960323307] [2021-11-23 03:50:55,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960323307] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:55,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:55,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 03:50:55,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299264936] [2021-11-23 03:50:55,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:55,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:50:55,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:55,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:50:55,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:50:55,344 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:55,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:55,511 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2021-11-23 03:50:55,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:50:55,511 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 03:50:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:55,512 INFO L225 Difference]: With dead ends: 115 [2021-11-23 03:50:55,512 INFO L226 Difference]: Without dead ends: 115 [2021-11-23 03:50:55,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:50:55,513 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 185 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:55,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 147 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:55,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-23 03:50:55,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-11-23 03:50:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 98 states have (on average 1.2959183673469388) internal successors, (127), 114 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:55,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 127 transitions. [2021-11-23 03:50:55,535 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 127 transitions. Word has length 22 [2021-11-23 03:50:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:55,536 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 127 transitions. [2021-11-23 03:50:55,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:55,537 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 127 transitions. [2021-11-23 03:50:55,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:50:55,538 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:55,538 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:55,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 03:50:55,539 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:55,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1244203163, now seen corresponding path program 1 times [2021-11-23 03:50:55,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:55,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194274543] [2021-11-23 03:50:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:55,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:55,681 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:55,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194274543] [2021-11-23 03:50:55,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194274543] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:55,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695653957] [2021-11-23 03:50:55,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:55,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:55,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:55,685 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:55,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:50:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:55,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 03:50:55,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:55,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:55,820 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:50:55,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 03:50:55,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:55,889 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:50:55,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-23 03:50:56,002 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:50:56,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-11-23 03:50:56,100 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 03:50:56,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 61 [2021-11-23 03:50:56,190 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 03:50:56,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 34 [2021-11-23 03:50:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:56,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:56,297 INFO L354 Elim1Store]: treesize reduction 18, result has 81.8 percent of original size [2021-11-23 03:50:56,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 92 [2021-11-23 03:50:56,998 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (let ((.cse0 (select (store (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) (or (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse0) (= .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 03:50:57,015 INFO L354 Elim1Store]: treesize reduction 119, result has 0.8 percent of original size [2021-11-23 03:50:57,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 1 [2021-11-23 03:50:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:50:57,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695653957] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:57,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:50:57,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 10] total 15 [2021-11-23 03:50:57,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378937177] [2021-11-23 03:50:57,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:57,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 03:50:57,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:50:57,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 03:50:57,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2021-11-23 03:50:57,027 INFO L87 Difference]: Start difference. First operand 115 states and 127 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:57,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:57,164 INFO L93 Difference]: Finished difference Result 114 states and 126 transitions. [2021-11-23 03:50:57,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:50:57,165 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 03:50:57,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:57,166 INFO L225 Difference]: With dead ends: 114 [2021-11-23 03:50:57,166 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 03:50:57,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=52, Invalid=223, Unknown=1, NotChecked=30, Total=306 [2021-11-23 03:50:57,167 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 32 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:57,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 242 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 122 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2021-11-23 03:50:57,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 03:50:57,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-11-23 03:50:57,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 98 states have (on average 1.2857142857142858) internal successors, (126), 113 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:57,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2021-11-23 03:50:57,172 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 22 [2021-11-23 03:50:57,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:57,172 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2021-11-23 03:50:57,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:57,172 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2021-11-23 03:50:57,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:50:57,173 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:57,173 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:57,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:57,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:57,374 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:50:57,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:57,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1575295288, now seen corresponding path program 1 times [2021-11-23 03:50:57,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:50:57,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090737859] [2021-11-23 03:50:57,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:57,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:50:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:57,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:57,615 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:50:57,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090737859] [2021-11-23 03:50:57,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090737859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:57,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519909630] [2021-11-23 03:50:57,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:57,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:57,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:57,621 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:57,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:50:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:57,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 03:50:57,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:57,720 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:50:57,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 03:50:57,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:50:57,816 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:50:57,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 03:50:57,981 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:50:57,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 03:50:58,018 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:58,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:58,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-23 03:50:58,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-23 03:50:58,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-11-23 03:50:58,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:50:58,220 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:50:58,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 03:50:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:58,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519909630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:58,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331726339] [2021-11-23 03:50:58,236 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 03:50:58,236 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:50:58,237 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:50:58,237 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:50:58,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:50:58,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:50:58,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:58,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:58,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:58,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:58,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:50:58,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:50:58,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:50:58,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:50:58,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:50:58,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 32 [2021-11-23 03:50:58,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:58,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:58,538 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:50:58,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 310 [2021-11-23 03:50:58,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:58,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:58,579 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:50:58,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 311 treesize of output 306 [2021-11-23 03:50:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:58,739 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 03:50:58,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 404 [2021-11-23 03:50:58,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:58,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:58,808 INFO L354 Elim1Store]: treesize reduction 208, result has 15.8 percent of original size [2021-11-23 03:50:58,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 432 treesize of output 377 [2021-11-23 03:50:58,961 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 03:50:58,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 398 treesize of output 392 [2021-11-23 03:50:59,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:59,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:59,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:59,131 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:50:59,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 315 treesize of output 310 [2021-11-23 03:50:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:59,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:59,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:59,169 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:50:59,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 311 treesize of output 306 [2021-11-23 03:50:59,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:59,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:59,303 INFO L354 Elim1Store]: treesize reduction 208, result has 15.8 percent of original size [2021-11-23 03:50:59,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 381 [2021-11-23 03:50:59,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:59,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:59,385 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 03:50:59,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 437 treesize of output 401 [2021-11-23 03:50:59,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:59,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:50:59,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:59,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:59,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:50:59,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:50:59,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:50:59,688 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 03:50:59,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 21 [2021-11-23 03:50:59,858 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 03:50:59,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 398 treesize of output 394 [2021-11-23 03:50:59,945 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:51:03,967 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5433#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:51:03,968 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:51:03,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:51:03,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 22 [2021-11-23 03:51:03,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048814171] [2021-11-23 03:51:03,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:03,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 03:51:03,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:03,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 03:51:03,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1350, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 03:51:03,970 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 23 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:04,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:04,344 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2021-11-23 03:51:04,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-23 03:51:04,345 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 03:51:04,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:04,346 INFO L225 Difference]: With dead ends: 116 [2021-11-23 03:51:04,346 INFO L226 Difference]: Without dead ends: 116 [2021-11-23 03:51:04,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=323, Invalid=1933, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 03:51:04,347 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 272 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:04,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 398 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 201 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2021-11-23 03:51:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-23 03:51:04,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 113. [2021-11-23 03:51:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 112 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2021-11-23 03:51:04,352 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 25 [2021-11-23 03:51:04,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:04,352 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2021-11-23 03:51:04,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5) internal successors, (55), 23 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:04,353 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2021-11-23 03:51:04,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:51:04,354 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:04,354 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:04,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:04,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 03:51:04,570 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:51:04,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:04,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1574864312, now seen corresponding path program 1 times [2021-11-23 03:51:04,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:04,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918251315] [2021-11-23 03:51:04,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:04,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:04,737 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:04,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918251315] [2021-11-23 03:51:04,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918251315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:51:04,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527110904] [2021-11-23 03:51:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:04,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:04,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:04,751 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:04,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:51:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 03:51:04,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:04,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:51:04,870 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:51:04,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 03:51:04,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:04,926 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:51:04,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 51 [2021-11-23 03:51:05,014 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:51:05,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 39 [2021-11-23 03:51:05,098 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-23 03:51:05,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 90 treesize of output 61 [2021-11-23 03:51:05,899 INFO L354 Elim1Store]: treesize reduction 106, result has 15.2 percent of original size [2021-11-23 03:51:05,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 50 [2021-11-23 03:51:06,061 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:51:06,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 03:51:06,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:06,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:11,058 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 03:51:11,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:11,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 104 [2021-11-23 03:51:13,353 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_54| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_54| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_54| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (select (store (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_54| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))))) is different from false [2021-11-23 03:51:13,479 INFO L354 Elim1Store]: treesize reduction 166, result has 30.5 percent of original size [2021-11-23 03:51:13,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 156 treesize of output 108 [2021-11-23 03:51:13,499 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 124 [2021-11-23 03:51:13,520 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:13,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 124 treesize of output 140 [2021-11-23 03:51:13,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:51:13,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:51:13,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:51:13,922 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:51:13,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 03:51:14,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:51:14,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:14,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-23 03:51:14,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:14,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 85 treesize of output 127 [2021-11-23 03:51:14,751 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:14,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 187 [2021-11-23 03:51:16,103 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:51:16,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2021-11-23 03:51:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 03:51:16,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527110904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:16,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [952088686] [2021-11-23 03:51:16,127 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 03:51:16,128 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:51:16,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:51:16,128 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:51:16,128 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:51:16,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:51:16,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:16,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:16,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:16,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:16,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:51:16,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:51:16,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:51:16,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:51:16,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:51:16,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2021-11-23 03:51:16,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:16,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,477 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 03:51:16,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 394 treesize of output 338 [2021-11-23 03:51:16,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:16,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,518 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 03:51:16,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 390 treesize of output 370 [2021-11-23 03:51:16,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:16,686 INFO L354 Elim1Store]: treesize reduction 228, result has 15.2 percent of original size [2021-11-23 03:51:16,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 473 treesize of output 399 [2021-11-23 03:51:16,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:16,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:16,764 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 03:51:16,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 416 treesize of output 378 [2021-11-23 03:51:16,930 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 03:51:16,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 418 treesize of output 410 [2021-11-23 03:51:17,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:17,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:17,100 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 03:51:17,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 394 treesize of output 338 [2021-11-23 03:51:17,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:17,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:17,138 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 03:51:17,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 390 treesize of output 370 [2021-11-23 03:51:17,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:17,240 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:17,332 INFO L354 Elim1Store]: treesize reduction 228, result has 15.2 percent of original size [2021-11-23 03:51:17,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 473 treesize of output 399 [2021-11-23 03:51:17,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:17,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:17,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:17,405 INFO L354 Elim1Store]: treesize reduction 180, result has 14.7 percent of original size [2021-11-23 03:51:17,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 416 treesize of output 378 [2021-11-23 03:51:17,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:17,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:17,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:17,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:17,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:17,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:17,666 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 03:51:17,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 21 [2021-11-23 03:51:17,858 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 03:51:17,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 418 treesize of output 404 [2021-11-23 03:51:17,951 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:51:22,384 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5864#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (or (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:51:22,384 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:51:22,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:51:22,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 23 [2021-11-23 03:51:22,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880889616] [2021-11-23 03:51:22,384 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:22,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 03:51:22,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 03:51:22,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1395, Unknown=4, NotChecked=154, Total=1722 [2021-11-23 03:51:22,386 INFO L87 Difference]: Start difference. First operand 113 states and 124 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:35,758 WARN L227 SmtUtils]: Spent 13.22s on a formula simplification. DAG size of input: 51 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:51:36,734 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0))) (and (= (select |c_#valid| .cse0) 1) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_53| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_53| 4)))) (= (select |c_#valid| .cse1) 1) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 03:51:37,963 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0))) (and (= (select |c_#valid| .cse0) 1) (not (= .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_53| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_53| 4)))) (= (select |c_#valid| .cse1) 1) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (<= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 03:51:38,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:38,247 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-11-23 03:51:38,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 03:51:38,247 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 03:51:38,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:38,248 INFO L225 Difference]: With dead ends: 115 [2021-11-23 03:51:38,249 INFO L226 Difference]: Without dead ends: 115 [2021-11-23 03:51:38,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 27.9s TimeCoverageRelationStatistics Valid=222, Invalid=1950, Unknown=6, NotChecked=372, Total=2550 [2021-11-23 03:51:38,251 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 58 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:38,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 716 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 330 Invalid, 0 Unknown, 171 Unchecked, 0.2s Time] [2021-11-23 03:51:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-23 03:51:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2021-11-23 03:51:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 113 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 125 transitions. [2021-11-23 03:51:38,255 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 125 transitions. Word has length 25 [2021-11-23 03:51:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:38,255 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 125 transitions. [2021-11-23 03:51:38,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:38,256 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 125 transitions. [2021-11-23 03:51:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 03:51:38,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:38,257 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:38,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:38,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 03:51:38,469 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:51:38,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:38,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1404313002, now seen corresponding path program 2 times [2021-11-23 03:51:38,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:38,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324265420] [2021-11-23 03:51:38,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:38,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:38,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:38,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:38,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324265420] [2021-11-23 03:51:38,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324265420] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:51:38,515 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:51:38,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:51:38,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494455884] [2021-11-23 03:51:38,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:51:38,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 03:51:38,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 03:51:38,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:51:38,517 INFO L87 Difference]: Start difference. First operand 114 states and 125 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:38,538 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2021-11-23 03:51:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 03:51:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 03:51:38,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:38,540 INFO L225 Difference]: With dead ends: 76 [2021-11-23 03:51:38,540 INFO L226 Difference]: Without dead ends: 76 [2021-11-23 03:51:38,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:51:38,541 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:38,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 76 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:51:38,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-23 03:51:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-11-23 03:51:38,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.2121212121212122) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-23 03:51:38,545 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 25 [2021-11-23 03:51:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:38,546 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-23 03:51:38,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-23 03:51:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:51:38,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:38,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:38,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 03:51:38,549 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:51:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:38,550 INFO L85 PathProgramCache]: Analyzing trace with hash 265543263, now seen corresponding path program 1 times [2021-11-23 03:51:38,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:38,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619912466] [2021-11-23 03:51:38,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:38,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:38,804 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619912466] [2021-11-23 03:51:38,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619912466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:51:38,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398664183] [2021-11-23 03:51:38,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:38,804 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:38,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:38,806 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:38,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:51:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:38,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 03:51:38,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:38,896 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:51:38,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 03:51:38,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:51:38,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:38,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 03:51:39,086 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:51:39,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-11-23 03:51:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:39,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:39,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 03:51:39,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-23 03:51:39,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-23 03:51:39,450 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:51:39,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 03:51:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:39,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398664183] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:39,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916838208] [2021-11-23 03:51:39,465 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-23 03:51:39,465 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:51:39,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:51:39,466 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:51:39,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:51:39,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:51:39,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:39,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:39,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:39,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:39,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:51:39,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:51:39,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:51:39,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,671 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 03:51:39,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 84 [2021-11-23 03:51:39,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,688 INFO L354 Elim1Store]: treesize reduction 35, result has 2.8 percent of original size [2021-11-23 03:51:39,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2021-11-23 03:51:39,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-23 03:51:39,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:39,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:39,842 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 03:51:39,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 331 treesize of output 322 [2021-11-23 03:51:39,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:39,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:39,894 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 03:51:39,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 327 treesize of output 331 [2021-11-23 03:51:39,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:39,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:39,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,077 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 03:51:40,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 467 treesize of output 382 [2021-11-23 03:51:40,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:40,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:40,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,170 INFO L354 Elim1Store]: treesize reduction 246, result has 13.4 percent of original size [2021-11-23 03:51:40,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 456 treesize of output 424 [2021-11-23 03:51:40,347 INFO L354 Elim1Store]: treesize reduction 186, result has 11.0 percent of original size [2021-11-23 03:51:40,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 409 treesize of output 398 [2021-11-23 03:51:40,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:40,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,561 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 03:51:40,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 331 treesize of output 322 [2021-11-23 03:51:40,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:40,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,612 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-23 03:51:40,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 327 treesize of output 331 [2021-11-23 03:51:40,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:40,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:40,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:40,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,828 INFO L354 Elim1Store]: treesize reduction 218, result has 14.8 percent of original size [2021-11-23 03:51:40,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 467 treesize of output 382 [2021-11-23 03:51:40,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:40,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:40,953 INFO L354 Elim1Store]: treesize reduction 238, result has 16.2 percent of original size [2021-11-23 03:51:40,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 472 treesize of output 448 [2021-11-23 03:51:41,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:41,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:41,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:41,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:41,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:41,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:41,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:41,273 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:41,290 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 03:51:41,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 28 [2021-11-23 03:51:41,464 INFO L354 Elim1Store]: treesize reduction 178, result has 14.8 percent of original size [2021-11-23 03:51:41,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 474 treesize of output 471 [2021-11-23 03:51:41,551 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:51:45,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6462#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= 0 (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| 0)) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:51:45,969 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:51:45,969 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:51:45,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2021-11-23 03:51:45,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686139862] [2021-11-23 03:51:45,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:45,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 03:51:45,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:45,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 03:51:45,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 03:51:45,971 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:46,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:46,463 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2021-11-23 03:51:46,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:51:46,463 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 03:51:46,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:46,464 INFO L225 Difference]: With dead ends: 78 [2021-11-23 03:51:46,464 INFO L226 Difference]: Without dead ends: 78 [2021-11-23 03:51:46,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 03:51:46,466 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 256 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:46,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 368 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 355 Invalid, 0 Unknown, 97 Unchecked, 0.2s Time] [2021-11-23 03:51:46,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-23 03:51:46,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-11-23 03:51:46,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.196969696969697) internal successors, (79), 74 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2021-11-23 03:51:46,469 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 26 [2021-11-23 03:51:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:46,469 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2021-11-23 03:51:46,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:46,469 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2021-11-23 03:51:46,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:51:46,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:46,470 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:46,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-23 03:51:46,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 03:51:46,689 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:51:46,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:46,689 INFO L85 PathProgramCache]: Analyzing trace with hash 265112287, now seen corresponding path program 1 times [2021-11-23 03:51:46,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:46,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162329356] [2021-11-23 03:51:46,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:46,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:46,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:46,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:46,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:46,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162329356] [2021-11-23 03:51:46,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162329356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:51:46,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023251759] [2021-11-23 03:51:46,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:46,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:46,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:46,862 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:46,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:51:46,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:46,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 03:51:46,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:46,958 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:51:46,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-23 03:51:47,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-23 03:51:47,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:51:47,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 03:51:47,122 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:51:47,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-11-23 03:51:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:47,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:47,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 03:51:47,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2021-11-23 03:51:47,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2021-11-23 03:51:47,435 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:51:47,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2021-11-23 03:51:47,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:47,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023251759] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:51:47,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [425848317] [2021-11-23 03:51:47,462 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-23 03:51:47,462 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:51:47,462 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:51:47,463 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:51:47,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:51:47,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:51:47,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:47,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:47,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:47,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:47,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:51:47,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:51:47,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:51:47,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,670 INFO L354 Elim1Store]: treesize reduction 48, result has 12.7 percent of original size [2021-11-23 03:51:47,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 101 treesize of output 84 [2021-11-23 03:51:47,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,689 INFO L354 Elim1Store]: treesize reduction 72, result has 8.9 percent of original size [2021-11-23 03:51:47,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 84 [2021-11-23 03:51:47,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 31 [2021-11-23 03:51:47,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:47,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:47,824 INFO L354 Elim1Store]: treesize reduction 130, result has 17.7 percent of original size [2021-11-23 03:51:47,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 332 treesize of output 336 [2021-11-23 03:51:47,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,835 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:47,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:47,878 INFO L354 Elim1Store]: treesize reduction 94, result has 19.0 percent of original size [2021-11-23 03:51:47,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 328 treesize of output 319 [2021-11-23 03:51:47,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:47,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:47,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,078 INFO L354 Elim1Store]: treesize reduction 244, result has 13.5 percent of original size [2021-11-23 03:51:48,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 468 treesize of output 401 [2021-11-23 03:51:48,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:48,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:48,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,196 INFO L354 Elim1Store]: treesize reduction 238, result has 13.1 percent of original size [2021-11-23 03:51:48,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 457 treesize of output 412 [2021-11-23 03:51:48,354 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 03:51:48,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 426 treesize of output 420 [2021-11-23 03:51:48,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:48,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,592 INFO L354 Elim1Store]: treesize reduction 130, result has 17.7 percent of original size [2021-11-23 03:51:48,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 332 treesize of output 336 [2021-11-23 03:51:48,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:48,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,665 INFO L354 Elim1Store]: treesize reduction 94, result has 19.0 percent of original size [2021-11-23 03:51:48,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 328 treesize of output 319 [2021-11-23 03:51:48,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:48,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:48,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:48,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,874 INFO L354 Elim1Store]: treesize reduction 244, result has 13.5 percent of original size [2021-11-23 03:51:48,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 468 treesize of output 401 [2021-11-23 03:51:48,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:48,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:48,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:49,026 INFO L354 Elim1Store]: treesize reduction 238, result has 13.1 percent of original size [2021-11-23 03:51:49,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 457 treesize of output 412 [2021-11-23 03:51:49,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:49,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:49,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:49,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:49,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:51:49,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:51:49,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:49,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:51:49,335 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 03:51:49,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 28 [2021-11-23 03:51:49,505 INFO L354 Elim1Store]: treesize reduction 88, result has 17.0 percent of original size [2021-11-23 03:51:49,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 426 treesize of output 420 [2021-11-23 03:51:49,574 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:51:53,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6822#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= 0 (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| 0)) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:51:53,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:51:53,818 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:51:53,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 23 [2021-11-23 03:51:53,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23880531] [2021-11-23 03:51:53,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:51:53,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-23 03:51:53,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:51:53,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-23 03:51:53,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1483, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 03:51:53,819 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:54,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:51:54,323 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2021-11-23 03:51:54,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:51:54,324 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 03:51:54,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:51:54,324 INFO L225 Difference]: With dead ends: 77 [2021-11-23 03:51:54,325 INFO L226 Difference]: Without dead ends: 77 [2021-11-23 03:51:54,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 42 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=335, Invalid=2017, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 03:51:54,326 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 320 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:51:54,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 332 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 347 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2021-11-23 03:51:54,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-23 03:51:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-11-23 03:51:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 73 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:54,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 78 transitions. [2021-11-23 03:51:54,329 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 78 transitions. Word has length 26 [2021-11-23 03:51:54,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:51:54,330 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 78 transitions. [2021-11-23 03:51:54,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:51:54,330 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 78 transitions. [2021-11-23 03:51:54,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:51:54,330 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:51:54,330 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:51:54,372 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:51:54,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 03:51:54,545 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:51:54,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:51:54,545 INFO L85 PathProgramCache]: Analyzing trace with hash -2026312865, now seen corresponding path program 1 times [2021-11-23 03:51:54,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:51:54,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755897836] [2021-11-23 03:51:54,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:54,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:51:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:54,924 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:51:54,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755897836] [2021-11-23 03:51:54,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755897836] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:51:54,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61256699] [2021-11-23 03:51:54,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:51:54,925 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:51:54,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:51:54,926 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:51:54,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:51:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:51:54,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-23 03:51:54,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:51:54,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:51:55,030 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 03:51:55,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-23 03:51:55,103 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 03:51:55,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:51:55,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:51:55,197 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:51:55,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 03:51:55,272 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:51:55,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-11-23 03:51:55,366 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 03:51:55,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 60 [2021-11-23 03:51:55,485 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 03:51:55,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 36 [2021-11-23 03:51:55,515 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:51:55,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 03:51:55,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:51:55,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:51:55,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:52:02,990 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 03:52:02,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 50 [2021-11-23 03:52:03,005 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-23 03:52:03,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 58 [2021-11-23 03:52:03,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:52:03,066 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:52:03,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 03:52:03,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:03,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2021-11-23 03:52:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:03,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61256699] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:52:03,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1490312655] [2021-11-23 03:52:03,441 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-23 03:52:03,441 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:52:03,442 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:52:03,442 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:52:03,442 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:52:03,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:52:03,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:03,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:03,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:03,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:03,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:52:03,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:52:03,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:52:03,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,603 INFO L354 Elim1Store]: treesize reduction 123, result has 10.9 percent of original size [2021-11-23 03:52:03,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 130 treesize of output 105 [2021-11-23 03:52:03,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,631 INFO L354 Elim1Store]: treesize reduction 111, result has 11.9 percent of original size [2021-11-23 03:52:03,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 92 [2021-11-23 03:52:03,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 40 [2021-11-23 03:52:03,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:03,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,719 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:03,760 INFO L354 Elim1Store]: treesize reduction 134, result has 11.8 percent of original size [2021-11-23 03:52:03,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 338 [2021-11-23 03:52:03,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:03,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:03,818 INFO L354 Elim1Store]: treesize reduction 148, result has 10.8 percent of original size [2021-11-23 03:52:03,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 343 treesize of output 328 [2021-11-23 03:52:03,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:03,948 INFO L354 Elim1Store]: treesize reduction 208, result has 15.8 percent of original size [2021-11-23 03:52:03,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 496 treesize of output 405 [2021-11-23 03:52:03,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:03,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:04,009 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 03:52:04,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 493 treesize of output 425 [2021-11-23 03:52:04,132 INFO L354 Elim1Store]: treesize reduction 216, result has 8.9 percent of original size [2021-11-23 03:52:04,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 454 treesize of output 439 [2021-11-23 03:52:04,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:04,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:04,243 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:04,286 INFO L354 Elim1Store]: treesize reduction 126, result has 17.1 percent of original size [2021-11-23 03:52:04,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 355 treesize of output 346 [2021-11-23 03:52:04,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:04,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:04,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:04,353 INFO L354 Elim1Store]: treesize reduction 148, result has 10.8 percent of original size [2021-11-23 03:52:04,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 351 treesize of output 332 [2021-11-23 03:52:04,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:04,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:04,506 INFO L354 Elim1Store]: treesize reduction 270, result has 12.3 percent of original size [2021-11-23 03:52:04,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 520 treesize of output 447 [2021-11-23 03:52:04,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:04,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:04,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:04,573 INFO L354 Elim1Store]: treesize reduction 208, result has 15.8 percent of original size [2021-11-23 03:52:04,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 488 treesize of output 401 [2021-11-23 03:52:04,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:04,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:04,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:04,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:04,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:04,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:04,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:04,850 INFO L354 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2021-11-23 03:52:04,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 53 [2021-11-23 03:52:05,027 INFO L354 Elim1Store]: treesize reduction 208, result has 12.2 percent of original size [2021-11-23 03:52:05,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 454 treesize of output 447 [2021-11-23 03:52:05,091 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:52:10,159 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7189#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (<= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (or (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1)) (<= 0 |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:52:10,159 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:52:10,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:52:10,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 31 [2021-11-23 03:52:10,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970855359] [2021-11-23 03:52:10,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:52:10,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 03:52:10,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:10,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 03:52:10,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=2363, Unknown=6, NotChecked=0, Total=2652 [2021-11-23 03:52:10,162 INFO L87 Difference]: Start difference. First operand 74 states and 78 transitions. Second operand has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:10,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:10,550 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-11-23 03:52:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:52:10,550 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 03:52:10,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:10,551 INFO L225 Difference]: With dead ends: 73 [2021-11-23 03:52:10,551 INFO L226 Difference]: Without dead ends: 73 [2021-11-23 03:52:10,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=384, Invalid=3150, Unknown=6, NotChecked=0, Total=3540 [2021-11-23 03:52:10,553 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 41 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:10,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 526 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 225 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2021-11-23 03:52:10,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-23 03:52:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-23 03:52:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 72 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:10,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2021-11-23 03:52:10,556 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 26 [2021-11-23 03:52:10,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:10,557 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2021-11-23 03:52:10,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.96875) internal successors, (63), 32 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:10,557 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2021-11-23 03:52:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:52:10,558 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:10,558 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:10,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:52:10,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 03:52:10,765 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:52:10,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:10,765 INFO L85 PathProgramCache]: Analyzing trace with hash -2026743841, now seen corresponding path program 1 times [2021-11-23 03:52:10,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:10,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365937907] [2021-11-23 03:52:10,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:10,765 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:10,931 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365937907] [2021-11-23 03:52:10,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365937907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:52:10,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346093443] [2021-11-23 03:52:10,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:10,931 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:10,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:10,933 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:52:10,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 03:52:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:11,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-23 03:52:11,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:11,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:52:11,048 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:52:11,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-23 03:52:11,101 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:52:11,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2021-11-23 03:52:11,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:11,152 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:52:11,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-11-23 03:52:11,218 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:52:11,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-11-23 03:52:11,307 INFO L354 Elim1Store]: treesize reduction 116, result has 20.5 percent of original size [2021-11-23 03:52:11,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 59 [2021-11-23 03:52:11,594 INFO L354 Elim1Store]: treesize reduction 96, result has 23.2 percent of original size [2021-11-23 03:52:11,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 58 [2021-11-23 03:52:11,724 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 03:52:11,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 27 [2021-11-23 03:52:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:11,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:12,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 03:52:12,641 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) is different from false [2021-11-23 03:52:13,288 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) is different from false [2021-11-23 03:52:36,034 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 03:52:36,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 56 [2021-11-23 03:52:36,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:36,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 72 [2021-11-23 03:52:36,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:52:36,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:52:36,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:52:36,214 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:52:36,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 03:52:36,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:36,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 117 [2021-11-23 03:52:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-11-23 03:52:36,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346093443] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:52:36,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [663135290] [2021-11-23 03:52:36,688 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2021-11-23 03:52:36,688 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:52:36,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:52:36,689 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:52:36,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:52:36,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:52:36,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:36,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:36,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:36,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:36,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:52:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:52:36,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:52:36,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:52:36,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:52:36,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 38 [2021-11-23 03:52:36,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:36,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,955 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 03:52:36,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 333 treesize of output 313 [2021-11-23 03:52:36,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:36,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:36,987 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 03:52:36,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 329 treesize of output 324 [2021-11-23 03:52:37,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:37,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:37,043 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:37,100 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 03:52:37,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 448 treesize of output 410 [2021-11-23 03:52:37,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:37,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:37,171 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 03:52:37,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 440 treesize of output 385 [2021-11-23 03:52:37,272 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 03:52:37,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 411 treesize of output 399 [2021-11-23 03:52:37,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:37,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:37,415 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-23 03:52:37,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 333 treesize of output 328 [2021-11-23 03:52:37,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:37,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:37,449 INFO L354 Elim1Store]: treesize reduction 66, result has 18.5 percent of original size [2021-11-23 03:52:37,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 329 treesize of output 309 [2021-11-23 03:52:37,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:37,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:37,573 INFO L354 Elim1Store]: treesize reduction 220, result has 15.7 percent of original size [2021-11-23 03:52:37,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 448 treesize of output 389 [2021-11-23 03:52:37,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:37,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:37,635 INFO L354 Elim1Store]: treesize reduction 180, result has 16.3 percent of original size [2021-11-23 03:52:37,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 445 treesize of output 407 [2021-11-23 03:52:37,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:37,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:37,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:37,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:37,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:37,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:37,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:37,927 INFO L354 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2021-11-23 03:52:37,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 53 [2021-11-23 03:52:38,096 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 03:52:38,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 411 treesize of output 405 [2021-11-23 03:52:38,165 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:52:43,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7553#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (or (= (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| 0)) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:52:43,192 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:52:43,192 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:52:43,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 32 [2021-11-23 03:52:43,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175244996] [2021-11-23 03:52:43,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:52:43,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-23 03:52:43,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:52:43,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-23 03:52:43,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=2159, Unknown=25, NotChecked=194, Total=2652 [2021-11-23 03:52:43,194 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 33 states, 32 states have (on average 2.1875) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:44,043 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (.cse1 (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1))) (and (or (and (not (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0)) (not (= 0 .cse0))) (not .cse1)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_79| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_79| 4)))) (= .cse0 1) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) .cse1 (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 03:52:44,882 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse0 (not (= 0 (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) (.cse1 (= .cse2 1))) (and (or (and (not (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) 0)) .cse0) (not .cse1)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_79| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_79| 4)))) .cse0 (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) .cse1 (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (not (= .cse2 0)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 03:52:45,626 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_79| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_79| 4)))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) is different from false [2021-11-23 03:52:46,192 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (and (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_79| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_79| 4)))) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 1) (not (= (select .cse0 0) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (forall ((|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int) (|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (not (= (select (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store .cse0 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 03:52:46,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:52:46,455 INFO L93 Difference]: Finished difference Result 72 states and 76 transitions. [2021-11-23 03:52:46,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:52:46,456 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-23 03:52:46,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:52:46,456 INFO L225 Difference]: With dead ends: 72 [2021-11-23 03:52:46,456 INFO L226 Difference]: Without dead ends: 72 [2021-11-23 03:52:46,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=354, Invalid=2833, Unknown=29, NotChecked=690, Total=3906 [2021-11-23 03:52:46,458 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:52:46,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 705 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 289 Invalid, 0 Unknown, 202 Unchecked, 0.2s Time] [2021-11-23 03:52:46,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-23 03:52:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-23 03:52:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-11-23 03:52:46,462 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 26 [2021-11-23 03:52:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:52:46,462 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-11-23 03:52:46,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.1875) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:52:46,463 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-11-23 03:52:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:52:46,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:52:46,463 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:52:46,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:52:46,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-23 03:52:46,685 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:52:46,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:52:46,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1485591414, now seen corresponding path program 1 times [2021-11-23 03:52:46,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:52:46,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859069374] [2021-11-23 03:52:46,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:46,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:52:46,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:47,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:47,157 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:52:47,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859069374] [2021-11-23 03:52:47,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859069374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:52:47,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886403321] [2021-11-23 03:52:47,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:52:47,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:52:47,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:52:47,159 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:52:47,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:52:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:52:47,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 03:52:47,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:52:47,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:52:47,279 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 03:52:47,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-23 03:52:47,380 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 03:52:47,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:52:47,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:47,491 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:52:47,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2021-11-23 03:52:47,585 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:52:47,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 43 [2021-11-23 03:52:47,689 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 03:52:47,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 60 [2021-11-23 03:52:47,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:47,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:47,892 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-11-23 03:52:47,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 03:52:48,224 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:52:48,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-11-23 03:52:48,309 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 03:52:48,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 30 [2021-11-23 03:52:48,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:52:48,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:52:49,570 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (let ((.cse1 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse0 (select .cse1 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (and (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) .cse0) 1) (not (= .cse0 (select .cse1 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))))))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 03:52:50,629 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))))))) is different from false [2021-11-23 03:52:50,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:50,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 177 treesize of output 181 [2021-11-23 03:52:52,761 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))) (forall ((v_prenex_7 Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (let ((.cse1 (store (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) v_prenex_7 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse1 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (select .cse1 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (store (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 03:52:52,890 INFO L354 Elim1Store]: treesize reduction 249, result has 30.4 percent of original size [2021-11-23 03:52:52,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 297 treesize of output 165 [2021-11-23 03:52:52,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:52,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 165 treesize of output 181 [2021-11-23 03:52:52,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:52,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 197 [2021-11-23 03:52:52,939 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:52,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 197 treesize of output 211 [2021-11-23 03:52:53,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:52:53,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:52:53,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:52:53,450 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:52:53,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 03:52:53,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:52:53,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:52:53,745 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:52:53,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 03:52:53,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:52:53,912 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:52:53,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 03:52:53,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:54,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:54,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 145 treesize of output 209 [2021-11-23 03:52:55,052 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:55,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 181 [2021-11-23 03:52:55,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:52:55,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 166 [2021-11-23 03:52:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 03:52:57,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886403321] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:52:57,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545674238] [2021-11-23 03:52:57,311 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 03:52:57,311 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:52:57,311 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:52:57,311 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:52:57,311 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:52:57,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:52:57,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:57,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:57,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:57,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:57,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:52:57,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 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 [2021-11-23 03:52:57,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:52:57,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:52:57,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 33 [2021-11-23 03:52:57,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 33 [2021-11-23 03:52:57,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:57,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:57,632 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:52:57,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 313 [2021-11-23 03:52:57,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:57,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:57,665 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 03:52:57,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 365 treesize of output 360 [2021-11-23 03:52:57,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:57,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:57,794 INFO L354 Elim1Store]: treesize reduction 170, result has 17.1 percent of original size [2021-11-23 03:52:57,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 453 treesize of output 379 [2021-11-23 03:52:57,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:57,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:57,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:57,859 INFO L354 Elim1Store]: treesize reduction 158, result has 16.4 percent of original size [2021-11-23 03:52:57,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 396 treesize of output 369 [2021-11-23 03:52:57,972 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 03:52:57,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 393 treesize of output 387 [2021-11-23 03:52:58,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,121 INFO L354 Elim1Store]: treesize reduction 64, result has 24.7 percent of original size [2021-11-23 03:52:58,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 369 treesize of output 364 [2021-11-23 03:52:58,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,131 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,153 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:52:58,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 365 treesize of output 309 [2021-11-23 03:52:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,298 INFO L354 Elim1Store]: treesize reduction 170, result has 17.1 percent of original size [2021-11-23 03:52:58,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 453 treesize of output 379 [2021-11-23 03:52:58,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,363 INFO L354 Elim1Store]: treesize reduction 158, result has 16.4 percent of original size [2021-11-23 03:52:58,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 396 treesize of output 369 [2021-11-23 03:52:58,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:58,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:52:58,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:58,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:52:58,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:52:58,595 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,606 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 03:52:58,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 21 [2021-11-23 03:52:58,680 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:52:58,697 INFO L354 Elim1Store]: treesize reduction 14, result has 50.0 percent of original size [2021-11-23 03:52:58,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-23 03:52:58,866 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 03:52:58,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 393 treesize of output 381 [2021-11-23 03:52:58,929 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:53:04,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7945#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| |#StackHeapBarrier|) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| |#StackHeapBarrier|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| 0)) (not (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 1)) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= 0 (select |#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)))' at error location [2021-11-23 03:53:04,553 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:53:04,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:53:04,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 40 [2021-11-23 03:53:04,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244053249] [2021-11-23 03:53:04,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:53:04,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-23 03:53:04,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:53:04,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-23 03:53:04,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=3114, Unknown=3, NotChecked=348, Total=3782 [2021-11-23 03:53:04,555 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 42 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:35,343 WARN L227 SmtUtils]: Spent 30.50s on a formula simplification. DAG size of input: 72 DAG size of output: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:53:36,599 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))))))) (= (select |c_#valid| .cse1) 1) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| .cse2) 1) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse2)) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse2)) (forall ((|v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_63| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_63|) 0)) (and (not (= |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_63| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_63| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (< |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 1)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_87| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_87| 4)))))) is different from false [2021-11-23 03:53:37,477 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse2 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) 1)) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)))))))) (= (select |c_#valid| .cse1) 1) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (= (select |c_#valid| .cse2) 1) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse2)) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse2)) (< |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 1)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_87| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_87| 4)))))) is different from false [2021-11-23 03:53:38,125 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse1 (select .cse4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse0 (select (store .cse4 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= (select |c_#valid| .cse0) 1) (= (select |c_#valid| .cse1) 1) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (let ((.cse3 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse2 (select .cse3 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (and (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) .cse2) 1) (not (= .cse2 (select .cse3 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))))))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse0)) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (< |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 1)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse0)) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_87| Int)) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_87| 4))))))) is different from false [2021-11-23 03:53:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:53:38,388 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2021-11-23 03:53:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 03:53:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 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 28 [2021-11-23 03:53:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:53:38,389 INFO L225 Difference]: With dead ends: 71 [2021-11-23 03:53:38,389 INFO L226 Difference]: Without dead ends: 71 [2021-11-23 03:53:38,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=396, Invalid=4044, Unknown=6, NotChecked=810, Total=5256 [2021-11-23 03:53:38,391 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 55 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:53:38,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 678 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 343 Invalid, 0 Unknown, 312 Unchecked, 0.2s Time] [2021-11-23 03:53:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-23 03:53:38,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-23 03:53:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 70 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2021-11-23 03:53:38,394 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 28 [2021-11-23 03:53:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:53:38,394 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2021-11-23 03:53:38,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:53:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2021-11-23 03:53:38,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:53:38,394 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:53:38,395 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:53:38,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:53:38,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 03:53:38,595 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:53:38,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:53:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1439909444, now seen corresponding path program 1 times [2021-11-23 03:53:38,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:53:38,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904509365] [2021-11-23 03:53:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:38,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:53:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:38,973 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:53:38,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904509365] [2021-11-23 03:53:38,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904509365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:53:38,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108809067] [2021-11-23 03:53:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:53:38,973 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:53:38,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:53:38,974 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:53:38,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:53:39,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:53:39,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-23 03:53:39,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:53:39,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:53:39,098 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 03:53:39,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-23 03:53:39,185 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 03:53:39,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:53:39,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:53:39,260 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:53:39,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 03:53:39,318 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:53:39,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-11-23 03:53:39,388 INFO L354 Elim1Store]: treesize reduction 94, result has 15.3 percent of original size [2021-11-23 03:53:39,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 60 [2021-11-23 03:53:39,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:39,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:39,539 INFO L354 Elim1Store]: treesize reduction 124, result has 16.8 percent of original size [2021-11-23 03:53:39,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 78 treesize of output 60 [2021-11-23 03:53:39,752 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:53:39,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2021-11-23 03:53:39,830 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 03:53:39,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 30 [2021-11-23 03:53:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:53:39,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:53:40,855 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (let ((.cse0 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse1 (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))) (and (not (= (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) .cse1)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) .cse1) 1)))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) is different from false [2021-11-23 03:53:40,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:40,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 105 [2021-11-23 03:53:41,724 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 03:53:43,813 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (let ((.cse0 (store (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store (select (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse2 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| Int)) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (select (store (select (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))))))) is different from false [2021-11-23 03:53:43,947 INFO L354 Elim1Store]: treesize reduction 249, result has 30.4 percent of original size [2021-11-23 03:53:43,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 301 treesize of output 169 [2021-11-23 03:53:43,962 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:43,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 169 treesize of output 183 [2021-11-23 03:53:43,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:43,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 183 treesize of output 199 [2021-11-23 03:53:43,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:43,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 199 treesize of output 215 [2021-11-23 03:53:44,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:53:44,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:53:44,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-23 03:53:44,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:44,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-23 03:53:44,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:53:44,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:44,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2021-11-23 03:53:44,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:53:44,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:53:44,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 03:53:44,801 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 03:53:44,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 03:53:44,890 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:44,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 113 treesize of output 159 [2021-11-23 03:53:46,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:46,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 111 treesize of output 199 [2021-11-23 03:53:47,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:47,252 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:53:47,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 155 treesize of output 333 [2021-11-23 03:53:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 03:53:54,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108809067] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:53:54,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [612192733] [2021-11-23 03:53:54,796 INFO L159 IcfgInterpreter]: Started Sifa with 24 locations of interest [2021-11-23 03:53:54,797 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:53:54,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:53:54,797 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:53:54,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:53:54,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:53:54,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:53:54,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:53:54,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:53:54,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:53:54,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2021-11-23 03:53:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:53:54,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 [2021-11-23 03:53:54,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,954 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-23 03:53:54,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 84 [2021-11-23 03:53:54,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2021-11-23 03:53:54,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:54,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 27 [2021-11-23 03:53:55,042 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,063 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:53:55,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 303 [2021-11-23 03:53:55,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,096 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:53:55,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 304 treesize of output 299 [2021-11-23 03:53:55,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,180 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,245 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 03:53:55,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 428 treesize of output 369 [2021-11-23 03:53:55,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,325 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-23 03:53:55,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 425 treesize of output 398 [2021-11-23 03:53:55,448 INFO L354 Elim1Store]: treesize reduction 92, result has 13.2 percent of original size [2021-11-23 03:53:55,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 386 treesize of output 376 [2021-11-23 03:53:55,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,575 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:53:55,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 308 treesize of output 303 [2021-11-23 03:53:55,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,603 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-23 03:53:55,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 304 treesize of output 299 [2021-11-23 03:53:55,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,720 INFO L354 Elim1Store]: treesize reduction 154, result has 18.5 percent of original size [2021-11-23 03:53:55,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 428 treesize of output 401 [2021-11-23 03:53:55,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:55,780 INFO L354 Elim1Store]: treesize reduction 162, result has 17.8 percent of original size [2021-11-23 03:53:55,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 420 treesize of output 365 [2021-11-23 03:53:55,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:53:55,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:53:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:53:55,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:53:55,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:53:55,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:53:56,000 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-23 03:53:56,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 21 [2021-11-23 03:53:56,122 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-23 03:53:56,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 53 [2021-11-23 03:53:56,269 INFO L354 Elim1Store]: treesize reduction 86, result has 18.9 percent of original size [2021-11-23 03:53:56,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 6 case distinctions, treesize of input 386 treesize of output 382 [2021-11-23 03:53:56,331 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:54:01,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8335#(and (= |ULTIMATE.start_dll_circular_create_~head~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) (not (= |ULTIMATE.start_dll_circular_create_~head~0#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|)) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base| |#StackHeapBarrier|) (= (select |#valid| |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) 0) (<= 1 |ULTIMATE.start_dll_circular_create_~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4))) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_main_~head~1#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base|) (= |ULTIMATE.start_dll_circular_create_#res#1.offset| |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (<= |#NULL.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4)) |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (<= 3 |ULTIMATE.start_dll_circular_create_#in~len#1|) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.offset| 0) (<= (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 8) (select |#length| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|)) (<= (+ |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4) (select |#length| |ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base| 0)) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_main_~head~1#1.base|) (= |ULTIMATE.start_main_~head~1#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (< |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |#StackHeapBarrier|) (<= |ULTIMATE.start_dll_circular_create_#in~len#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.offset|) (= |ULTIMATE.start_dll_circular_create_~last~0#1.offset| 0) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) (= (select |#valid| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) 0) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (<= |ULTIMATE.start_main_~len~0#1| 3) (= |ULTIMATE.start__destroy_in_nondeterministic_order_~succ~0#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|)) (= |ULTIMATE.start__destroy_in_nondeterministic_order_#in~head#1.base| |ULTIMATE.start_main_~head~1#1.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_dll_circular_create_~len#1| 1) (<= 3 |ULTIMATE.start_main_~len~0#1|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_dll_circular_create_#res#1.base| |ULTIMATE.start_dll_circular_create_~head~0#1.base|) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |ULTIMATE.start__destroy_in_nondeterministic_order_~pred~0#1.base|) (= |#NULL.base| 0))' at error location [2021-11-23 03:54:01,731 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:54:01,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:54:01,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 41 [2021-11-23 03:54:01,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798020737] [2021-11-23 03:54:01,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:54:01,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-23 03:54:01,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:54:01,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-23 03:54:01,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3216, Unknown=3, NotChecked=354, Total=3906 [2021-11-23 03:54:01,733 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 43 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:02,715 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse2 (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store .cse1 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (<= 0 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_94| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_94| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (<= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 0) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse2)) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse2)) (< |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 1)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 03:54:03,425 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (not (let ((.cse0 (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (= (select .cse0 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) (select .cse0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_94| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_94| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (< |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 1)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)))) is different from false [2021-11-23 03:54:04,034 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) (let ((.cse1 (select .cse0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (and (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store .cse0 (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (exists ((|v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_94| Int)) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (+ |v_ULTIMATE.start_dll_circular_create_~head~0#1.offset_94| 4)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (<= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse1)) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1)) (< |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| (+ |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 1)) (forall ((|ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| Int)) (or (< |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 0) (let ((.cse2 (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (let ((.cse3 (select .cse2 (+ |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset| 4)))) (and (not (= (select .cse2 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|) .cse3)) (= (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| 0) .cse3) 1)))) (< 0 |ULTIMATE.start__destroy_in_nondeterministic_order_~head#1.offset|))) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| Int)) (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (not (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))))) is different from false [2021-11-23 03:54:04,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:04,238 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2021-11-23 03:54:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:54:04,238 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 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 28 [2021-11-23 03:54:04,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:04,239 INFO L225 Difference]: With dead ends: 70 [2021-11-23 03:54:04,239 INFO L226 Difference]: Without dead ends: 70 [2021-11-23 03:54:04,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 1661 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=411, Invalid=4029, Unknown=6, NotChecked=810, Total=5256 [2021-11-23 03:54:04,241 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 61 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:04,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 721 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 227 Invalid, 0 Unknown, 304 Unchecked, 0.1s Time] [2021-11-23 03:54:04,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-23 03:54:04,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-23 03:54:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 66 states have (on average 1.121212121212121) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:04,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-11-23 03:54:04,244 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 28 [2021-11-23 03:54:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:04,244 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-11-23 03:54:04,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:04,245 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-11-23 03:54:04,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:54:04,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:04,245 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:04,279 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:04,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 03:54:04,461 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:04,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:04,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1784011906, now seen corresponding path program 1 times [2021-11-23 03:54:04,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:54:04,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396570406] [2021-11-23 03:54:04,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:04,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:54:04,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:54:04,492 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 03:54:04,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 03:54:04,564 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 03:54:04,564 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 03:54:04,565 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_LEAK (58 of 59 remaining) [2021-11-23 03:54:04,567 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (57 of 59 remaining) [2021-11-23 03:54:04,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (56 of 59 remaining) [2021-11-23 03:54:04,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (55 of 59 remaining) [2021-11-23 03:54:04,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (54 of 59 remaining) [2021-11-23 03:54:04,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (53 of 59 remaining) [2021-11-23 03:54:04,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (52 of 59 remaining) [2021-11-23 03:54:04,568 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (51 of 59 remaining) [2021-11-23 03:54:04,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (50 of 59 remaining) [2021-11-23 03:54:04,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (49 of 59 remaining) [2021-11-23 03:54:04,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (48 of 59 remaining) [2021-11-23 03:54:04,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (47 of 59 remaining) [2021-11-23 03:54:04,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (46 of 59 remaining) [2021-11-23 03:54:04,569 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12REQUIRES_VIOLATION (45 of 59 remaining) [2021-11-23 03:54:04,570 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (44 of 59 remaining) [2021-11-23 03:54:04,570 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (43 of 59 remaining) [2021-11-23 03:54:04,570 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATION (42 of 59 remaining) [2021-11-23 03:54:04,570 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE (41 of 59 remaining) [2021-11-23 03:54:04,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE (40 of 59 remaining) [2021-11-23 03:54:04,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE (39 of 59 remaining) [2021-11-23 03:54:04,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_FREE (38 of 59 remaining) [2021-11-23 03:54:04,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE (37 of 59 remaining) [2021-11-23 03:54:04,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE (36 of 59 remaining) [2021-11-23 03:54:04,571 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE (35 of 59 remaining) [2021-11-23 03:54:04,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE (34 of 59 remaining) [2021-11-23 03:54:04,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE (33 of 59 remaining) [2021-11-23 03:54:04,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE (32 of 59 remaining) [2021-11-23 03:54:04,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_FREE (31 of 59 remaining) [2021-11-23 03:54:04,572 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE (30 of 59 remaining) [2021-11-23 03:54:04,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr28ASSERT_VIOLATIONMEMORY_FREE (29 of 59 remaining) [2021-11-23 03:54:04,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr29ASSERT_VIOLATIONMEMORY_FREE (28 of 59 remaining) [2021-11-23 03:54:04,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr30ASSERT_VIOLATIONMEMORY_FREE (27 of 59 remaining) [2021-11-23 03:54:04,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE (26 of 59 remaining) [2021-11-23 03:54:04,573 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (25 of 59 remaining) [2021-11-23 03:54:04,574 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (24 of 59 remaining) [2021-11-23 03:54:04,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE (23 of 59 remaining) [2021-11-23 03:54:04,575 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE (22 of 59 remaining) [2021-11-23 03:54:04,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE (21 of 59 remaining) [2021-11-23 03:54:04,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_FREE (20 of 59 remaining) [2021-11-23 03:54:04,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr38ASSERT_VIOLATIONMEMORY_FREE (19 of 59 remaining) [2021-11-23 03:54:04,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr39ASSERT_VIOLATIONMEMORY_FREE (18 of 59 remaining) [2021-11-23 03:54:04,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr40ASSERT_VIOLATIONMEMORY_FREE (17 of 59 remaining) [2021-11-23 03:54:04,576 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr41ASSERT_VIOLATIONMEMORY_FREE (16 of 59 remaining) [2021-11-23 03:54:04,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE (15 of 59 remaining) [2021-11-23 03:54:04,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE (14 of 59 remaining) [2021-11-23 03:54:04,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE (13 of 59 remaining) [2021-11-23 03:54:04,577 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr45ASSERT_VIOLATIONMEMORY_FREE (12 of 59 remaining) [2021-11-23 03:54:04,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE (11 of 59 remaining) [2021-11-23 03:54:04,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE (10 of 59 remaining) [2021-11-23 03:54:04,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE (9 of 59 remaining) [2021-11-23 03:54:04,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr49ASSERT_VIOLATIONMEMORY_FREE (8 of 59 remaining) [2021-11-23 03:54:04,578 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_FREE (7 of 59 remaining) [2021-11-23 03:54:04,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE (6 of 59 remaining) [2021-11-23 03:54:04,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr52ASSERT_VIOLATIONMEMORY_FREE (5 of 59 remaining) [2021-11-23 03:54:04,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr53ASSERT_VIOLATIONMEMORY_FREE (4 of 59 remaining) [2021-11-23 03:54:04,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr54ASSERT_VIOLATIONMEMORY_FREE (3 of 59 remaining) [2021-11-23 03:54:04,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr55ASSERT_VIOLATIONMEMORY_FREE (2 of 59 remaining) [2021-11-23 03:54:04,579 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE (1 of 59 remaining) [2021-11-23 03:54:04,580 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE (0 of 59 remaining) [2021-11-23 03:54:04,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-23 03:54:04,585 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:04,589 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:54:04,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:54:04 BoogieIcfgContainer [2021-11-23 03:54:04,657 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:54:04,658 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:54:04,658 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:54:04,658 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:54:04,659 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:50:18" (3/4) ... [2021-11-23 03:54:04,661 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 03:54:04,662 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:54:04,662 INFO L158 Benchmark]: Toolchain (without parser) took 227514.24ms. Allocated memory was 119.5MB in the beginning and 297.8MB in the end (delta: 178.3MB). Free memory was 75.8MB in the beginning and 141.7MB in the end (delta: -65.9MB). Peak memory consumption was 112.4MB. Max. memory is 16.1GB. [2021-11-23 03:54:04,662 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 119.5MB. Free memory is still 93.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:54:04,662 INFO L158 Benchmark]: CACSL2BoogieTranslator took 513.15ms. Allocated memory is still 119.5MB. Free memory was 75.6MB in the beginning and 88.1MB in the end (delta: -12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:54:04,663 INFO L158 Benchmark]: Boogie Procedure Inliner took 62.83ms. Allocated memory is still 119.5MB. Free memory was 88.1MB in the beginning and 86.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:54:04,663 INFO L158 Benchmark]: Boogie Preprocessor took 35.86ms. Allocated memory is still 119.5MB. Free memory was 86.1MB in the beginning and 84.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:54:04,664 INFO L158 Benchmark]: RCFGBuilder took 702.20ms. Allocated memory is still 119.5MB. Free memory was 84.3MB in the beginning and 65.1MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-11-23 03:54:04,664 INFO L158 Benchmark]: TraceAbstraction took 226188.92ms. Allocated memory was 119.5MB in the beginning and 297.8MB in the end (delta: 178.3MB). Free memory was 64.7MB in the beginning and 142.8MB in the end (delta: -78.1MB). Peak memory consumption was 103.8MB. Max. memory is 16.1GB. [2021-11-23 03:54:04,664 INFO L158 Benchmark]: Witness Printer took 3.94ms. Allocated memory is still 297.8MB. Free memory was 142.8MB in the beginning and 141.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:54:04,665 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 119.5MB. Free memory is still 93.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 513.15ms. Allocated memory is still 119.5MB. Free memory was 75.6MB in the beginning and 88.1MB in the end (delta: -12.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 62.83ms. Allocated memory is still 119.5MB. Free memory was 88.1MB in the beginning and 86.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.86ms. Allocated memory is still 119.5MB. Free memory was 86.1MB in the beginning and 84.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 702.20ms. Allocated memory is still 119.5MB. Free memory was 84.3MB in the beginning and 65.1MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 226188.92ms. Allocated memory was 119.5MB in the beginning and 297.8MB in the end (delta: 178.3MB). Free memory was 64.7MB in the beginning and 142.8MB in the end (delta: -78.1MB). Peak memory consumption was 103.8MB. Max. memory is 16.1GB. * Witness Printer took 3.94ms. Allocated memory is still 297.8MB. Free memory was 142.8MB in the beginning and 141.7MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 616]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 616. Possible FailurePath: [L617] const int len = 3; [L618] CALL, EXPR dll_circular_create(len) [L564] DLL last = (DLL) malloc(sizeof(struct node)); [L565] COND FALSE !(((void *)0) == last) VAL [\old(len)=3, last={5:0}, len=3] [L568] last->next = last VAL [\old(len)=3, last={5:0}, len=3] [L569] last->prev = last [L570] DLL head = last; VAL [\old(len)=3, head={5:0}, last={5:0}, len=3] [L571] COND TRUE len > 1 [L572] DLL new_head = (DLL) malloc(sizeof(struct node)); [L573] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={5:0}, last={5:0}, len=3, new_head={-2:0}] [L576] new_head->next = head VAL [\old(len)=3, head={5:0}, last={5:0}, len=3, new_head={-2:0}] [L577] head->prev = new_head [L578] head = new_head [L579] len-- VAL [\old(len)=3, head={-2:0}, last={5:0}, len=2, new_head={-2:0}] [L571] COND TRUE len > 1 [L572] DLL new_head = (DLL) malloc(sizeof(struct node)); [L573] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=3, head={-2:0}, last={5:0}, len=2, new_head={3:0}] [L576] new_head->next = head VAL [\old(len)=3, head={-2:0}, last={5:0}, len=2, new_head={3:0}] [L577] head->prev = new_head [L578] head = new_head [L579] len-- VAL [\old(len)=3, head={3:0}, last={5:0}, len=1, new_head={3:0}] [L571] COND FALSE !(len > 1) VAL [\old(len)=3, head={3:0}, last={5:0}, len=1, new_head={3:0}] [L581] last->next = head VAL [\old(len)=3, head={3:0}, last={5:0}, len=1, new_head={3:0}] [L582] head->prev = last [L583] return head; [L618] RET, EXPR dll_circular_create(len) [L618] DLL head = dll_circular_create(len); [L619] CALL _destroy_in_nondeterministic_order(head) [L586] EXPR head->prev [L586] DLL pred = head->prev; [L587] EXPR head->next [L587] DLL succ = head->next; [L588] COND FALSE !(__VERIFIER_nondet_int()) [L597] COND FALSE !(__VERIFIER_nondet_int()) [L607] free(pred) VAL [head={3:0}, head={3:0}, pred={5:0}, succ={-2:0}] [L607] free(pred) VAL [head={3:0}, head={3:0}, pred={5:0}, succ={-2:0}] [L607] free(pred) [L608] COND FALSE !(__VERIFIER_nondet_int()) [L612] free(head) VAL [head={3:0}, head={3:0}, pred={5:0}, succ={-2:0}] [L612] free(head) VAL [head={3:0}, head={3:0}, pred={5:0}, succ={-2:0}] [L612] free(head) [L619] RET _destroy_in_nondeterministic_order(head) [L620] head = ((void *)0) [L621] return 0; VAL [\result=0, head={0:0}, len=3] - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 568]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 569]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 569]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 576]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 577]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 581]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 582]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 586]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 587]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 589]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 591]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 592]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 594]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 595]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 598]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 600]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 601]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 603]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 603]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 603]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 604]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 604]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 604]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 607]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 609]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 610]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 612]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 126 locations, 59 error locations. Started 1 CEGAR loops. OverallTime: 226.1s, OverallIterations: 30, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 60.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3837 SdHoareTripleChecker+Valid, 3.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3837 mSDsluCounter, 8805 SdHoareTripleChecker+Invalid, 2.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1797 IncrementalHoareTripleChecker+Unchecked, 6746 mSDsCounter, 256 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4257 IncrementalHoareTripleChecker+Invalid, 6310 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 256 mSolverCounterUnsat, 2111 mSDtfsCounter, 4257 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1150 GetRequests, 475 SyntacticMatches, 42 SemanticMatches, 633 ConstructedPredicates, 23 IntricatePredicates, 0 DeprecatedPredicates, 9510 ImplicationChecksByTransitivity, 165.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=125occurred in iteration=0, InterpolantAutomatonStates: 240, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 29 MinimizatonAttempts, 36 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 90.3s InterpolantComputationTime, 829 NumberOfCodeBlocks, 829 NumberOfCodeBlocksAsserted, 43 NumberOfCheckSat, 1042 ConstructedInterpolants, 158 QuantifiedInterpolants, 13333 SizeOfPredicates, 208 NumberOfNonLiveVariables, 1915 ConjunctsInSsa, 420 ConjunctsInUnsatCore, 55 InterpolantComputations, 17 PerfectInterpolantSequences, 74/271 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: OVERALL_TIME: 1.8s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 18, TOOLS_POST_TIME: 1.7s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 18, TOOLS_QUANTIFIERELIM_TIME: 1.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 33, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.9s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.9s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 80, DAG_COMPRESSION_RETAINED_NODES: 29, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 03:54:04,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V --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 2f737570030041640fd86c7d2770b30b4e6ee4ac0d1c521887700aab87fb1426 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:54:07,117 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:54:07,120 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:54:07,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:54:07,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:54:07,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:54:07,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:54:07,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:54:07,181 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:54:07,189 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:54:07,191 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:54:07,192 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:54:07,193 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:54:07,195 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:54:07,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:54:07,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:54:07,203 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:54:07,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:54:07,206 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:54:07,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:54:07,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:54:07,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:54:07,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:54:07,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:54:07,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:54:07,226 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:54:07,227 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:54:07,228 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:54:07,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:54:07,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:54:07,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:54:07,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:54:07,234 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:54:07,235 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:54:07,236 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:54:07,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:54:07,237 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:54:07,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:54:07,238 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:54:07,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:54:07,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:54:07,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 03:54:07,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:54:07,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:54:07,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:54:07,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:54:07,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:54:07,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:54:07,288 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:54:07,289 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:54:07,289 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:54:07,290 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:54:07,291 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:54:07,291 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:54:07,293 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:54:07,293 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:54:07,293 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:54:07,294 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:54:07,294 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:54:07,294 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:54:07,294 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:54:07,295 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:54:07,295 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:54:07,295 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:54:07,295 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:54:07,295 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:54:07,296 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:54:07,296 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:54:07,296 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:54:07,296 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:54:07,297 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:54:07,297 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:54:07,297 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:54:07,298 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:54:07,298 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:07,298 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:54:07,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:54:07,299 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:54:07,299 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:54:07,299 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:54:07,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:54:07,300 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f737570030041640fd86c7d2770b30b4e6ee4ac0d1c521887700aab87fb1426 [2021-11-23 03:54:07,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:54:07,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:54:07,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:54:07,709 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:54:07,710 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:54:07,711 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-2.i [2021-11-23 03:54:07,783 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data/06c64b594/e6c60044f3ce4979b650aae65033338d/FLAGac3b21065 [2021-11-23 03:54:08,314 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:54:08,315 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/sv-benchmarks/c/list-ext3-properties/dll_nondet_free_order-2.i [2021-11-23 03:54:08,343 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data/06c64b594/e6c60044f3ce4979b650aae65033338d/FLAGac3b21065 [2021-11-23 03:54:08,612 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/data/06c64b594/e6c60044f3ce4979b650aae65033338d [2021-11-23 03:54:08,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:54:08,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:54:08,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:08,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:54:08,629 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:54:08,630 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:08" (1/1) ... [2021-11-23 03:54:08,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c5fdf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:08, skipping insertion in model container [2021-11-23 03:54:08,632 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:54:08" (1/1) ... [2021-11-23 03:54:08,642 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:54:08,704 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:54:09,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:09,095 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:54:09,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:54:09,166 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:54:09,166 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09 WrapperNode [2021-11-23 03:54:09,166 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:54:09,168 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:09,168 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:54:09,168 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:54:09,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,227 INFO L137 Inliner]: procedures = 117, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 120 [2021-11-23 03:54:09,229 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:54:09,230 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:54:09,231 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:54:09,231 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:54:09,239 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,261 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,282 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:54:09,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:54:09,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:54:09,291 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:54:09,291 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (1/1) ... [2021-11-23 03:54:09,307 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:54:09,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:09,338 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:54:09,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:54:09,398 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-23 03:54:09,399 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-23 03:54:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:54:09,399 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:54:09,401 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:54:09,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:54:09,401 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:54:09,402 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:54:09,553 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:54:09,555 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:54:09,593 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-23 03:54:09,973 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:54:09,982 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:54:09,982 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:54:09,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:09 BoogieIcfgContainer [2021-11-23 03:54:09,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:54:09,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:54:09,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:54:09,990 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:54:09,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:54:08" (1/3) ... [2021-11-23 03:54:09,991 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cea5090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:09, skipping insertion in model container [2021-11-23 03:54:09,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:54:09" (2/3) ... [2021-11-23 03:54:09,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cea5090 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:54:09, skipping insertion in model container [2021-11-23 03:54:09,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:54:09" (3/3) ... [2021-11-23 03:54:09,993 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nondet_free_order-2.i [2021-11-23 03:54:09,998 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:54:09,999 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2021-11-23 03:54:10,043 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:54:10,049 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:54:10,050 INFO L340 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2021-11-23 03:54:10,067 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 131 states have internal predecessors, (139), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:10,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:54:10,074 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:10,075 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:54:10,075 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:10,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1079622, now seen corresponding path program 1 times [2021-11-23 03:54:10,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:10,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1831348437] [2021-11-23 03:54:10,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:10,093 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:10,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:10,099 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:10,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:54:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:10,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:54:10,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:10,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:10,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:10,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:10,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:10,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1831348437] [2021-11-23 03:54:10,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1831348437] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:10,281 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:10,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 03:54:10,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704389198] [2021-11-23 03:54:10,283 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:10,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:10,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:10,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:10,358 INFO L87 Difference]: Start difference. First operand has 133 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 131 states have internal predecessors, (139), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:10,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:10,537 INFO L93 Difference]: Finished difference Result 130 states and 137 transitions. [2021-11-23 03:54:10,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:10,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 03:54:10,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:10,549 INFO L225 Difference]: With dead ends: 130 [2021-11-23 03:54:10,549 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 03:54:10,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:10,554 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 50 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:10,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 165 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:54:10,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 03:54:10,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-23 03:54:10,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 68 states have (on average 1.8970588235294117) internal successors, (129), 123 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 129 transitions. [2021-11-23 03:54:10,598 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 129 transitions. Word has length 4 [2021-11-23 03:54:10,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:10,599 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 129 transitions. [2021-11-23 03:54:10,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:10,599 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 129 transitions. [2021-11-23 03:54:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-23 03:54:10,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:10,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-23 03:54:10,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:10,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:10,811 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:10,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1079623, now seen corresponding path program 1 times [2021-11-23 03:54:10,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:10,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1640150983] [2021-11-23 03:54:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:10,813 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:10,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:10,815 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:10,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:54:10,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:10,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:54:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:10,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:10,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:10,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:10,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:10,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:10,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1640150983] [2021-11-23 03:54:10,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1640150983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:10,978 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:10,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-23 03:54:10,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898034292] [2021-11-23 03:54:10,979 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:10,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:54:10,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:10,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:54:10,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:10,981 INFO L87 Difference]: Start difference. First operand 124 states and 129 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:11,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:11,066 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-11-23 03:54:11,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:11,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-11-23 03:54:11,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:11,069 INFO L225 Difference]: With dead ends: 121 [2021-11-23 03:54:11,070 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 03:54:11,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:11,072 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 244 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:11,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 111 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:54:11,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 03:54:11,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-23 03:54:11,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 68 states have (on average 1.8529411764705883) internal successors, (126), 120 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:11,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2021-11-23 03:54:11,087 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 4 [2021-11-23 03:54:11,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:11,087 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2021-11-23 03:54:11,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:11,088 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2021-11-23 03:54:11,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:54:11,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:11,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:11,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:11,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:11,306 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:11,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2065247192, now seen corresponding path program 1 times [2021-11-23 03:54:11,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:11,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1396516101] [2021-11-23 03:54:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:11,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:11,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:11,309 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:11,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 03:54:11,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:11,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:54:11,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:11,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:11,433 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:11,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1396516101] [2021-11-23 03:54:11,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1396516101] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:11,434 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:11,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-23 03:54:11,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556335381] [2021-11-23 03:54:11,435 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:11,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:54:11,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:11,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:54:11,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:11,437 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:11,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:11,458 INFO L93 Difference]: Finished difference Result 131 states and 136 transitions. [2021-11-23 03:54:11,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:54:11,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:54:11,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:11,461 INFO L225 Difference]: With dead ends: 131 [2021-11-23 03:54:11,461 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 03:54:11,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:11,463 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 24 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:11,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 242 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:54:11,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 03:54:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2021-11-23 03:54:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 74 states have (on average 1.837837837837838) internal successors, (136), 126 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:11,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 136 transitions. [2021-11-23 03:54:11,475 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 136 transitions. Word has length 9 [2021-11-23 03:54:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:11,476 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 136 transitions. [2021-11-23 03:54:11,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:11,476 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 136 transitions. [2021-11-23 03:54:11,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:54:11,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:11,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:11,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:11,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:11,688 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:11,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:11,690 INFO L85 PathProgramCache]: Analyzing trace with hash 2065248729, now seen corresponding path program 1 times [2021-11-23 03:54:11,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:11,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089264841] [2021-11-23 03:54:11,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:11,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:11,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:11,693 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:11,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 03:54:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:11,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:54:11,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:11,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:11,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:11,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:11,827 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:11,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089264841] [2021-11-23 03:54:11,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089264841] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:11,834 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:11,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 03:54:11,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600563162] [2021-11-23 03:54:11,835 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:11,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:54:11,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:54:11,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:11,839 INFO L87 Difference]: Start difference. First operand 127 states and 136 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:11,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:11,977 INFO L93 Difference]: Finished difference Result 126 states and 134 transitions. [2021-11-23 03:54:11,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:11,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:54:11,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:11,980 INFO L225 Difference]: With dead ends: 126 [2021-11-23 03:54:11,980 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 03:54:11,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:54:11,981 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 40 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:11,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 159 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:54:11,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 03:54:11,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2021-11-23 03:54:11,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 74 states have (on average 1.8108108108108107) internal successors, (134), 125 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 134 transitions. [2021-11-23 03:54:12,002 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 134 transitions. Word has length 9 [2021-11-23 03:54:12,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:12,003 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 134 transitions. [2021-11-23 03:54:12,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:12,003 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 134 transitions. [2021-11-23 03:54:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 03:54:12,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:12,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:12,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:12,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:12,209 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:12,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:12,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2065248730, now seen corresponding path program 1 times [2021-11-23 03:54:12,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:12,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [930819620] [2021-11-23 03:54:12,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:12,210 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:12,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:12,212 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:12,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 03:54:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:12,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:54:12,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:12,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:12,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:12,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:12,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:12,373 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:12,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [930819620] [2021-11-23 03:54:12,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [930819620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:12,373 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:12,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-23 03:54:12,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159570391] [2021-11-23 03:54:12,374 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:12,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:54:12,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:12,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:54:12,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:12,375 INFO L87 Difference]: Start difference. First operand 126 states and 134 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:12,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:12,487 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2021-11-23 03:54:12,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:54:12,489 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 03:54:12,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:12,490 INFO L225 Difference]: With dead ends: 125 [2021-11-23 03:54:12,490 INFO L226 Difference]: Without dead ends: 125 [2021-11-23 03:54:12,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:12,491 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 116 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:12,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 118 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:54:12,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-23 03:54:12,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-23 03:54:12,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 74 states have (on average 1.7837837837837838) internal successors, (132), 124 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2021-11-23 03:54:12,515 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 9 [2021-11-23 03:54:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:12,515 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2021-11-23 03:54:12,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:12,516 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2021-11-23 03:54:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:54:12,516 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:12,517 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:12,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:12,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:12,728 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:12,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:12,729 INFO L85 PathProgramCache]: Analyzing trace with hash -401798830, now seen corresponding path program 1 times [2021-11-23 03:54:12,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:12,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431603228] [2021-11-23 03:54:12,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:12,729 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:12,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:12,730 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:12,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 03:54:12,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:12,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:54:12,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:12,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:12,882 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:54:12,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2021-11-23 03:54:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:12,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:12,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:12,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431603228] [2021-11-23 03:54:12,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431603228] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:12,994 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:12,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 03:54:12,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220476624] [2021-11-23 03:54:12,995 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:12,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:54:12,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:12,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:54:12,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:54:12,996 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:13,184 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2021-11-23 03:54:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:54:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2021-11-23 03:54:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:13,185 INFO L225 Difference]: With dead ends: 126 [2021-11-23 03:54:13,185 INFO L226 Difference]: Without dead ends: 126 [2021-11-23 03:54:13,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 03:54:13,187 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 76 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:13,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 205 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:54:13,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-23 03:54:13,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-11-23 03:54:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 74 states have (on average 1.7702702702702702) internal successors, (131), 124 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 131 transitions. [2021-11-23 03:54:13,195 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 131 transitions. Word has length 10 [2021-11-23 03:54:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:13,195 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 131 transitions. [2021-11-23 03:54:13,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 131 transitions. [2021-11-23 03:54:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 03:54:13,196 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:13,197 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:13,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:13,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:13,407 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:13,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:13,408 INFO L85 PathProgramCache]: Analyzing trace with hash -401798829, now seen corresponding path program 1 times [2021-11-23 03:54:13,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:13,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437553451] [2021-11-23 03:54:13,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:13,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:13,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:13,410 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:13,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 03:54:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:54:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:13,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:13,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:13,618 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:54:13,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 03:54:13,631 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:54:13,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2021-11-23 03:54:13,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:13,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:16,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:16,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437553451] [2021-11-23 03:54:16,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437553451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:16,677 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:16,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-11-23 03:54:16,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797850819] [2021-11-23 03:54:16,678 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:16,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:54:16,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:16,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:54:16,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-23 03:54:16,681 INFO L87 Difference]: Start difference. First operand 125 states and 131 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:16,886 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2021-11-23 03:54:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:54:16,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 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 10 [2021-11-23 03:54:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:16,899 INFO L225 Difference]: With dead ends: 125 [2021-11-23 03:54:16,899 INFO L226 Difference]: Without dead ends: 125 [2021-11-23 03:54:16,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=25, Invalid=46, Unknown=1, NotChecked=0, Total=72 [2021-11-23 03:54:16,900 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 109 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:16,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 292 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2021-11-23 03:54:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-23 03:54:16,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-23 03:54:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 74 states have (on average 1.7567567567567568) internal successors, (130), 124 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 130 transitions. [2021-11-23 03:54:16,917 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 130 transitions. Word has length 10 [2021-11-23 03:54:16,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:16,917 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 130 transitions. [2021-11-23 03:54:16,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 130 transitions. [2021-11-23 03:54:16,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:54:16,918 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:16,918 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:16,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:17,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:17,119 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:17,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash 6511237, now seen corresponding path program 1 times [2021-11-23 03:54:17,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:17,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [395285918] [2021-11-23 03:54:17,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:17,121 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:17,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:17,122 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:17,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 03:54:17,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:17,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 03:54:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:17,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:17,305 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:54:17,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 03:54:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:17,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:17,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:17,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [395285918] [2021-11-23 03:54:17,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [395285918] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:54:17,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [368647627] [2021-11-23 03:54:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:17,448 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:54:17,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:54:17,454 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:54:17,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 03:54:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:17,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:54:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:17,647 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:54:17,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-11-23 03:54:17,718 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:54:17,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-11-23 03:54:17,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:17,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:17,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [368647627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:54:17,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61120917] [2021-11-23 03:54:17,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:17,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:17,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:17,841 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:17,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 03:54:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:17,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:54:17,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:17,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:18,001 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:54:18,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 33 [2021-11-23 03:54:18,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:18,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:26,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61120917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:54:26,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:54:26,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 4, 3, 4, 4] total 7 [2021-11-23 03:54:26,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956243883] [2021-11-23 03:54:26,358 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:54:26,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:54:26,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:26,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:54:26,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=31, Unknown=3, NotChecked=0, Total=56 [2021-11-23 03:54:26,359 INFO L87 Difference]: Start difference. First operand 125 states and 130 transitions. Second operand has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:26,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:26,550 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2021-11-23 03:54:26,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:54:26,551 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 03:54:26,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:26,552 INFO L225 Difference]: With dead ends: 123 [2021-11-23 03:54:26,552 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 03:54:26,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 7 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=38, Invalid=49, Unknown=3, NotChecked=0, Total=90 [2021-11-23 03:54:26,554 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 69 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:26,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 251 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 97 Unchecked, 0.1s Time] [2021-11-23 03:54:26,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 03:54:26,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-23 03:54:26,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 74 states have (on average 1.7297297297297298) internal successors, (128), 122 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:26,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 128 transitions. [2021-11-23 03:54:26,562 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 128 transitions. Word has length 15 [2021-11-23 03:54:26,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:26,562 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 128 transitions. [2021-11-23 03:54:26,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.0) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:26,563 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 128 transitions. [2021-11-23 03:54:26,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 03:54:26,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:26,564 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:26,573 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:26,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:26,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:27,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:27,181 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:27,182 INFO L85 PathProgramCache]: Analyzing trace with hash 6511238, now seen corresponding path program 1 times [2021-11-23 03:54:27,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:27,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [388301281] [2021-11-23 03:54:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:27,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:27,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:27,184 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:27,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 03:54:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:27,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:54:27,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:27,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:27,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:27,470 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:54:27,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 03:54:27,488 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:54:27,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 03:54:27,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:27,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:30,445 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:30,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [388301281] [2021-11-23 03:54:30,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [388301281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:54:30,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1194572840] [2021-11-23 03:54:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:30,446 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:54:30,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:54:30,449 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:54:30,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 03:54:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:30,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:54:30,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:30,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:30,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:30,753 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:54:30,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 03:54:30,774 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:54:30,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 03:54:30,853 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:30,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:33,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1194572840] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:54:33,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034838288] [2021-11-23 03:54:33,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:33,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:54:33,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:54:33,352 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:54:33,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 03:54:33,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:33,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:54:33,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:33,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:33,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:33,570 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:54:33,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 03:54:33,594 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:54:33,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-11-23 03:54:33,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:33,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:36,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:36,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034838288] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:54:36,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:54:36,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-11-23 03:54:36,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124474049] [2021-11-23 03:54:36,314 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:54:36,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:54:36,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:36,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:54:36,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=37, Unknown=1, NotChecked=0, Total=56 [2021-11-23 03:54:36,315 INFO L87 Difference]: Start difference. First operand 123 states and 128 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:36,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:36,771 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2021-11-23 03:54:36,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:54:36,773 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-23 03:54:36,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:36,774 INFO L225 Difference]: With dead ends: 121 [2021-11-23 03:54:36,774 INFO L226 Difference]: Without dead ends: 121 [2021-11-23 03:54:36,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=41, Invalid=68, Unknown=1, NotChecked=0, Total=110 [2021-11-23 03:54:36,776 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 141 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:36,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 373 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 55 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2021-11-23 03:54:36,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-11-23 03:54:36,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2021-11-23 03:54:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 74 states have (on average 1.7027027027027026) internal successors, (126), 120 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 126 transitions. [2021-11-23 03:54:36,781 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 126 transitions. Word has length 15 [2021-11-23 03:54:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:36,782 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 126 transitions. [2021-11-23 03:54:36,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:36,782 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 126 transitions. [2021-11-23 03:54:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:54:36,783 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:36,783 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:36,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:37,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:37,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 03:54:37,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:37,397 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:37,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:37,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1580520033, now seen corresponding path program 1 times [2021-11-23 03:54:37,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:37,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094135997] [2021-11-23 03:54:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:37,398 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:37,399 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:37,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 03:54:37,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:37,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:54:37,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:37,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:54:37,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:54:37,689 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:37,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094135997] [2021-11-23 03:54:37,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094135997] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:37,690 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:37,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-23 03:54:37,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758967150] [2021-11-23 03:54:37,690 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:37,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:54:37,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:54:37,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:54:37,691 INFO L87 Difference]: Start difference. First operand 121 states and 126 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:38,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:38,152 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2021-11-23 03:54:38,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:54:38,153 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 03:54:38,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:38,154 INFO L225 Difference]: With dead ends: 118 [2021-11-23 03:54:38,154 INFO L226 Difference]: Without dead ends: 118 [2021-11-23 03:54:38,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:54:38,155 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 106 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:38,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 303 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:54:38,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-23 03:54:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2021-11-23 03:54:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 74 states have (on average 1.662162162162162) internal successors, (123), 117 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:38,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 123 transitions. [2021-11-23 03:54:38,160 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 123 transitions. Word has length 22 [2021-11-23 03:54:38,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:38,160 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 123 transitions. [2021-11-23 03:54:38,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:38,160 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 123 transitions. [2021-11-23 03:54:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:54:38,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:38,161 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:54:38,180 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:38,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:38,372 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:38,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:38,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1580520034, now seen corresponding path program 1 times [2021-11-23 03:54:38,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:38,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1597681512] [2021-11-23 03:54:38,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:38,373 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:38,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:38,374 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:38,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 03:54:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:38,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 03:54:38,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:38,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:38,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:54:38,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:39,154 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:54:39,154 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:39,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1597681512] [2021-11-23 03:54:39,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1597681512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:39,154 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:39,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-11-23 03:54:39,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187665289] [2021-11-23 03:54:39,155 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:39,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:54:39,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:39,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:54:39,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:54:39,157 INFO L87 Difference]: Start difference. First operand 118 states and 123 transitions. Second operand has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:39,745 INFO L93 Difference]: Finished difference Result 111 states and 116 transitions. [2021-11-23 03:54:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 03:54:39,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 03:54:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:39,747 INFO L225 Difference]: With dead ends: 111 [2021-11-23 03:54:39,747 INFO L226 Difference]: Without dead ends: 111 [2021-11-23 03:54:39,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:54:39,749 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 580 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:39,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [580 Valid, 96 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 03:54:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-23 03:54:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-11-23 03:54:39,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 110 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:39,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 116 transitions. [2021-11-23 03:54:39,753 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 116 transitions. Word has length 22 [2021-11-23 03:54:39,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:39,754 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 116 transitions. [2021-11-23 03:54:39,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:39,754 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 116 transitions. [2021-11-23 03:54:39,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:54:39,755 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:39,756 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:54:39,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:39,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:39,968 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:39,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:39,969 INFO L85 PathProgramCache]: Analyzing trace with hash 67241285, now seen corresponding path program 1 times [2021-11-23 03:54:39,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:39,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [508780878] [2021-11-23 03:54:39,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:39,970 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:39,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:39,970 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:39,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 03:54:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:40,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:54:40,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:54:40,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:54:40,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:40,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [508780878] [2021-11-23 03:54:40,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [508780878] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:40,973 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:40,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 11 [2021-11-23 03:54:40,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537264936] [2021-11-23 03:54:40,974 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:40,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:54:40,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:40,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:54:40,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:54:40,975 INFO L87 Difference]: Start difference. First operand 111 states and 116 transitions. Second operand has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:41,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:41,181 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2021-11-23 03:54:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:54:41,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 12 states have internal predecessors, (56), 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 28 [2021-11-23 03:54:41,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:41,184 INFO L225 Difference]: With dead ends: 113 [2021-11-23 03:54:41,184 INFO L226 Difference]: Without dead ends: 113 [2021-11-23 03:54:41,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:54:41,185 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 80 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:41,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 457 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2021-11-23 03:54:41,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-23 03:54:41,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2021-11-23 03:54:41,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 74 states have (on average 1.554054054054054) internal successors, (115), 109 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:41,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 115 transitions. [2021-11-23 03:54:41,191 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 115 transitions. Word has length 28 [2021-11-23 03:54:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:41,191 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 115 transitions. [2021-11-23 03:54:41,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.090909090909091) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:41,192 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 115 transitions. [2021-11-23 03:54:41,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:54:41,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:41,193 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:54:41,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 03:54:41,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:41,406 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:41,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash 67280267, now seen corresponding path program 1 times [2021-11-23 03:54:41,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:41,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164980667] [2021-11-23 03:54:41,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:41,407 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:41,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:41,408 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:41,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 03:54:41,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:41,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 03:54:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:41,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 03:54:41,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:54:41,840 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:54:41,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:54:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:54:42,086 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:54:42,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164980667] [2021-11-23 03:54:42,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164980667] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:54:42,087 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:54:42,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [] total 12 [2021-11-23 03:54:42,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406622159] [2021-11-23 03:54:42,087 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:54:42,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 03:54:42,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:54:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 03:54:42,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:54:42,089 INFO L87 Difference]: Start difference. First operand 110 states and 115 transitions. Second operand has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:54:42,798 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2021-11-23 03:54:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:54:42,799 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 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 28 [2021-11-23 03:54:42,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:54:42,800 INFO L225 Difference]: With dead ends: 105 [2021-11-23 03:54:42,800 INFO L226 Difference]: Without dead ends: 105 [2021-11-23 03:54:42,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:54:42,801 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 709 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:54:42,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [709 Valid, 151 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:54:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-23 03:54:42,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-11-23 03:54:42,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 74 states have (on average 1.4864864864864864) internal successors, (110), 104 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:42,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 110 transitions. [2021-11-23 03:54:42,806 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 110 transitions. Word has length 28 [2021-11-23 03:54:42,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:54:42,806 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 110 transitions. [2021-11-23 03:54:42,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 13 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:54:42,806 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 110 transitions. [2021-11-23 03:54:42,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:54:42,807 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:54:42,807 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:54:42,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 03:54:43,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:54:43,025 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:54:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:54:43,025 INFO L85 PathProgramCache]: Analyzing trace with hash 67279051, now seen corresponding path program 1 times [2021-11-23 03:54:43,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:54:43,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [896254508] [2021-11-23 03:54:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:54:43,026 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:54:43,027 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:54:43,027 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:54:43,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 03:54:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:54:43,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:54:43,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:54:43,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:54:43,390 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:54:43,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 03:54:43,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:54:43,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 03:54:43,815 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-23 03:54:43,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2021-11-23 03:54:43,941 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:54:43,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:54:43,992 INFO L354 Elim1Store]: treesize reduction 68, result has 18.1 percent of original size [2021-11-23 03:54:43,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 43 treesize of output 48 [2021-11-23 03:54:44,454 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-23 03:54:44,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 24 [2021-11-23 03:54:44,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:54:44,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:25,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:25,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:55:25,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [896254508] [2021-11-23 03:55:25,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [896254508] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:25,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [346048506] [2021-11-23 03:55:25,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:25,601 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:55:25,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:55:25,608 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:55:25,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-11-23 03:55:25,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:25,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 03:55:25,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:25,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:55:26,424 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:55:26,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 03:55:26,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:55:26,824 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:55:26,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 03:55:27,192 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-23 03:55:27,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 37 [2021-11-23 03:55:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:55:27,419 INFO L354 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2021-11-23 03:55:27,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 53 [2021-11-23 03:55:28,259 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-23 03:55:28,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 29 [2021-11-23 03:55:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:28,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:40,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [346048506] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:40,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161846369] [2021-11-23 03:55:40,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:55:40,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:55:40,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:55:40,592 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:55:40,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 03:55:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:55:40,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:55:40,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:55:40,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:55:40,813 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:55:40,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 03:55:40,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:55:41,124 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-23 03:55:41,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2021-11-23 03:55:41,522 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-23 03:55:41,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 41 [2021-11-23 03:55:41,833 INFO L354 Elim1Store]: treesize reduction 112, result has 16.4 percent of original size [2021-11-23 03:55:41,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 53 [2021-11-23 03:55:43,020 INFO L354 Elim1Store]: treesize reduction 68, result has 1.4 percent of original size [2021-11-23 03:55:43,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 29 [2021-11-23 03:55:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:43,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:55:48,261 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:55:48,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-23 03:55:48,295 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:55:48,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161846369] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:55:48,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:55:48,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 16, 13, 15, 14] total 56 [2021-11-23 03:55:48,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766529599] [2021-11-23 03:55:48,296 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:55:48,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-23 03:55:48,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:55:48,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-23 03:55:48,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2853, Unknown=20, NotChecked=0, Total=3192 [2021-11-23 03:55:48,300 INFO L87 Difference]: Start difference. First operand 105 states and 110 transitions. Second operand has 57 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 57 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:14,837 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_37| (_ BitVec 32))) (or (let ((.cse0 (= (_ bv0 32) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) (and (or .cse0 (= |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_37| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) (or .cse0 (= (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) (_ bv0 32))))) (not (= (_ bv0 1) (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_dll_circular_create_~new_head~0#1.base_37|))))))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) (_ bv0 32)))) is different from false [2021-11-23 03:56:55,711 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 32 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:56:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:56,013 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2021-11-23 03:56:56,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 03:56:56,014 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 57 states have internal predecessors, (102), 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 28 [2021-11-23 03:56:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:56,015 INFO L225 Difference]: With dead ends: 119 [2021-11-23 03:56:56,015 INFO L226 Difference]: Without dead ends: 119 [2021-11-23 03:56:56,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1349 ImplicationChecksByTransitivity, 127.0s TimeCoverageRelationStatistics Valid=521, Invalid=3869, Unknown=36, NotChecked=130, Total=4556 [2021-11-23 03:56:56,019 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 112 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1798 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:56,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 1798 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 295 Invalid, 0 Unknown, 283 Unchecked, 0.7s Time] [2021-11-23 03:56:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-23 03:56:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2021-11-23 03:56:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 74 states have (on average 1.4324324324324325) internal successors, (106), 100 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 106 transitions. [2021-11-23 03:56:56,024 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 106 transitions. Word has length 28 [2021-11-23 03:56:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:56,024 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 106 transitions. [2021-11-23 03:56:56,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.8214285714285714) internal successors, (102), 57 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 106 transitions. [2021-11-23 03:56:56,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:56:56,026 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:56,026 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:56:56,063 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-23 03:56:56,265 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 03:56:56,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-11-23 03:56:56,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:56:56,653 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:56:56,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:56,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2085688457, now seen corresponding path program 1 times [2021-11-23 03:56:56,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:56:56,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [330900015] [2021-11-23 03:56:56,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:56,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:56:56,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:56:56,666 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:56:56,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 03:56:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:56,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 03:56:56,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:56:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:56:57,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 03:56:57,313 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:56:57,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:56:57,675 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:56:57,675 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:56:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [330900015] [2021-11-23 03:56:57,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [330900015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:56:57,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:56:57,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [] total 16 [2021-11-23 03:56:57,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634874395] [2021-11-23 03:56:57,675 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:56:57,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:56:57,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:56:57,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:56:57,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-11-23 03:56:57,677 INFO L87 Difference]: Start difference. First operand 101 states and 106 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:56:59,079 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2021-11-23 03:56:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:56:59,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 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 29 [2021-11-23 03:56:59,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:56:59,083 INFO L225 Difference]: With dead ends: 96 [2021-11-23 03:56:59,083 INFO L226 Difference]: Without dead ends: 96 [2021-11-23 03:56:59,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=367, Unknown=0, NotChecked=0, Total=506 [2021-11-23 03:56:59,087 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 648 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 648 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:56:59,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [648 Valid, 69 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 03:56:59,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-23 03:56:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-11-23 03:56:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 74 states have (on average 1.364864864864865) internal successors, (101), 95 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2021-11-23 03:56:59,093 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 29 [2021-11-23 03:56:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:56:59,094 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2021-11-23 03:56:59,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:56:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2021-11-23 03:56:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:56:59,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:56:59,096 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:56:59,105 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 03:56:59,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:56:59,305 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:56:59,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:56:59,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2085650723, now seen corresponding path program 1 times [2021-11-23 03:56:59,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:56:59,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [220435456] [2021-11-23 03:56:59,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:56:59,306 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:56:59,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:56:59,306 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:56:59,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-11-23 03:56:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:56:59,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:56:59,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:56:59,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:56:59,607 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:56:59,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 03:56:59,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:56:59,772 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:56:59,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-23 03:57:00,068 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:57:00,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 37 [2021-11-23 03:57:00,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:00,294 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-11-23 03:57:00,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 53 [2021-11-23 03:57:00,882 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 03:57:00,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 27 [2021-11-23 03:57:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:57:01,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:57:03,409 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (bvult (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2021-11-23 03:57:05,429 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (bvult (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2021-11-23 03:57:07,447 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (bvult (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_#StackHeapBarrier|)) is different from false [2021-11-23 03:57:08,384 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:57:08,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-11-23 03:57:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-23 03:57:08,492 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:57:08,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [220435456] [2021-11-23 03:57:08,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [220435456] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:57:08,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [355394657] [2021-11-23 03:57:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:08,493 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:57:08,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:57:08,494 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:57:08,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-11-23 03:57:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:57:08,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:57:08,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:57:09,204 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:57:09,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 03:57:09,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:57:09,549 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:57:09,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-23 03:57:10,028 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:57:10,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 37 [2021-11-23 03:57:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:10,287 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-11-23 03:57:10,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 49 [2021-11-23 03:57:11,066 INFO L354 Elim1Store]: treesize reduction 47, result has 7.8 percent of original size [2021-11-23 03:57:11,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 47 treesize of output 27 [2021-11-23 03:57:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:57:11,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:57:22,062 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:57:22,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2021-11-23 03:57:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:57:22,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [355394657] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:57:22,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056610842] [2021-11-23 03:57:22,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:22,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:57:22,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:57:22,268 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:57:22,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 03:57:22,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:22,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 03:57:22,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:57:22,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:57:22,507 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:57:22,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 03:57:22,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:57:22,934 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:57:22,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-11-23 03:57:23,435 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:57:23,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 37 [2021-11-23 03:57:23,779 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-23 03:57:23,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 53 [2021-11-23 03:57:24,843 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-11-23 03:57:24,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 27 [2021-11-23 03:57:24,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:57:24,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:57:25,626 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:57:25,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-23 03:57:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-23 03:57:25,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056610842] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:57:25,671 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:57:25,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16, 14, 15, 14] total 55 [2021-11-23 03:57:25,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701524014] [2021-11-23 03:57:25,672 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:57:25,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-23 03:57:25,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:57:25,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-23 03:57:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=2529, Unknown=5, NotChecked=312, Total=3080 [2021-11-23 03:57:25,675 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand has 56 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 56 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:57:35,015 WARN L227 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 31 DAG size of output: 30 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:57:35,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:35,955 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2021-11-23 03:57:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:57:35,956 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 56 states have internal predecessors, (97), 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 29 [2021-11-23 03:57:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:35,957 INFO L225 Difference]: With dead ends: 145 [2021-11-23 03:57:35,957 INFO L226 Difference]: Without dead ends: 145 [2021-11-23 03:57:35,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 1077 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=322, Invalid=3107, Unknown=5, NotChecked=348, Total=3782 [2021-11-23 03:57:35,960 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 92 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 649 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:35,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 908 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 599 Invalid, 0 Unknown, 649 Unchecked, 1.3s Time] [2021-11-23 03:57:35,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-23 03:57:35,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 133. [2021-11-23 03:57:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 111 states have (on average 1.3243243243243243) internal successors, (147), 132 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:57:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 147 transitions. [2021-11-23 03:57:35,965 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 147 transitions. Word has length 29 [2021-11-23 03:57:35,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:35,965 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 147 transitions. [2021-11-23 03:57:35,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.7636363636363637) internal successors, (97), 56 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:57:35,966 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 147 transitions. [2021-11-23 03:57:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:57:35,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:35,967 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:57:35,983 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2021-11-23 03:57:36,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 03:57:36,381 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-11-23 03:57:36,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:57:36,580 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr48ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:57:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:36,580 INFO L85 PathProgramCache]: Analyzing trace with hash 231832909, now seen corresponding path program 1 times [2021-11-23 03:57:36,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:57:36,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1713395428] [2021-11-23 03:57:36,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:36,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:57:36,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:57:36,582 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:57:36,625 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-23 03:57:36,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:36,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:57:36,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:57:36,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 03:57:36,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-11-23 03:57:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:57:36,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:57:37,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 03:57:37,194 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:57:37,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1713395428] [2021-11-23 03:57:37,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1713395428] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:57:37,194 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:57:37,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 7] imperfect sequences [] total 13 [2021-11-23 03:57:37,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408182091] [2021-11-23 03:57:37,195 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:57:37,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 03:57:37,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:57:37,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 03:57:37,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:57:37,197 INFO L87 Difference]: Start difference. First operand 133 states and 147 transitions. Second operand has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:57:38,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:57:38,117 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2021-11-23 03:57:38,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:57:38,117 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-23 03:57:38,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:57:38,118 INFO L225 Difference]: With dead ends: 132 [2021-11-23 03:57:38,118 INFO L226 Difference]: Without dead ends: 132 [2021-11-23 03:57:38,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-11-23 03:57:38,120 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 314 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:57:38,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 287 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 03:57:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-23 03:57:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2021-11-23 03:57:38,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 111 states have (on average 1.3063063063063063) internal successors, (145), 131 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:57:38,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 145 transitions. [2021-11-23 03:57:38,125 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 145 transitions. Word has length 30 [2021-11-23 03:57:38,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:57:38,126 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 145 transitions. [2021-11-23 03:57:38,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.769230769230769) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:57:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 145 transitions. [2021-11-23 03:57:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 03:57:38,127 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:57:38,127 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:57:38,149 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-11-23 03:57:38,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:57:38,340 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:57:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:57:38,340 INFO L85 PathProgramCache]: Analyzing trace with hash 230663117, now seen corresponding path program 1 times [2021-11-23 03:57:38,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:57:38,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [300351494] [2021-11-23 03:57:38,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:38,341 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:57:38,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:57:38,341 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:57:38,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-11-23 03:57:38,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:38,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:57:38,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:57:38,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:57:38,585 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:57:38,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 03:57:38,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:57:38,714 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:57:38,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-11-23 03:57:38,906 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:57:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 48 [2021-11-23 03:57:39,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:39,078 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-11-23 03:57:39,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 67 [2021-11-23 03:57:39,517 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 03:57:39,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 44 [2021-11-23 03:57:39,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:57:39,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:57:42,020 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))))))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-23 03:57:44,036 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))))))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-23 03:57:44,069 INFO L354 Elim1Store]: treesize reduction 5, result has 87.5 percent of original size [2021-11-23 03:57:44,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 70 [2021-11-23 03:57:46,083 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|))) is different from false [2021-11-23 03:57:46,416 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:57:46,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2021-11-23 03:57:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-23 03:57:46,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:57:46,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [300351494] [2021-11-23 03:57:46,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [300351494] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:57:46,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1116667384] [2021-11-23 03:57:46,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:57:46,442 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:57:46,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:57:46,447 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:57:46,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-11-23 03:57:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:57:46,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 03:57:46,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:57:46,839 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:57:46,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-11-23 03:57:47,214 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-23 03:57:47,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 35 treesize of output 52 [2021-11-23 03:57:47,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:57:47,634 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:57:47,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-11-23 03:57:48,084 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:57:48,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 59 treesize of output 56 [2021-11-23 03:57:48,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:57:48,335 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-11-23 03:57:48,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 83 [2021-11-23 03:57:49,098 INFO L354 Elim1Store]: treesize reduction 47, result has 7.8 percent of original size [2021-11-23 03:57:49,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 73 [2021-11-23 03:57:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:57:49,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:58:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:58:19,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1116667384] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:58:19,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546738708] [2021-11-23 03:58:19,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:19,374 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:58:19,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:58:19,375 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:58:19,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-23 03:58:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:58:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:58:19,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:58:21,557 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:58:21,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-23 03:58:21,641 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:58:21,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 03:58:21,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:58:21,916 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:58:21,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-11-23 03:58:22,305 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:58:22,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 47 [2021-11-23 03:58:22,625 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-23 03:58:22,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 66 treesize of output 66 [2021-11-23 03:58:23,426 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-11-23 03:58:23,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 43 [2021-11-23 03:58:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:58:23,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:58:25,670 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-23 03:58:27,691 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))))))))))))))))))) (_ bv1 1)))) is different from false [2021-11-23 03:58:27,731 INFO L354 Elim1Store]: treesize reduction 5, result has 87.5 percent of original size [2021-11-23 03:58:27,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 69 [2021-11-23 03:58:28,030 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-23 03:58:28,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546738708] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:58:28,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:58:28,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 17, 13, 14, 13] total 59 [2021-11-23 03:58:28,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876482209] [2021-11-23 03:58:28,031 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:58:28,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 03:58:28,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:58:28,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 03:58:28,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=2647, Unknown=15, NotChecked=550, Total=3540 [2021-11-23 03:58:28,034 INFO L87 Difference]: Start difference. First operand 132 states and 145 transitions. Second operand has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:58:41,045 WARN L227 SmtUtils]: Spent 8.17s on a formula simplification. DAG size of input: 62 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:58:41,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:41,516 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2021-11-23 03:58:41,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 03:58:41,517 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 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 30 [2021-11-23 03:58:41,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:41,518 INFO L225 Difference]: With dead ends: 131 [2021-11-23 03:58:41,518 INFO L226 Difference]: Without dead ends: 131 [2021-11-23 03:58:41,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 102 SyntacticMatches, 18 SemanticMatches, 63 ConstructedPredicates, 5 IntricatePredicates, 1 DeprecatedPredicates, 1616 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=452, Invalid=3093, Unknown=15, NotChecked=600, Total=4160 [2021-11-23 03:58:41,521 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 22 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 1518 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 531 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:41,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 1518 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 195 Invalid, 0 Unknown, 531 Unchecked, 0.4s Time] [2021-11-23 03:58:41,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-23 03:58:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-11-23 03:58:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 111 states have (on average 1.2972972972972974) internal successors, (144), 130 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:58:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 144 transitions. [2021-11-23 03:58:41,528 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 144 transitions. Word has length 30 [2021-11-23 03:58:41,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:41,528 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 144 transitions. [2021-11-23 03:58:41,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.0338983050847457) internal successors, (120), 60 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:58:41,529 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 144 transitions. [2021-11-23 03:58:41,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:58:41,529 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:41,530 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:58:41,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-11-23 03:58:41,740 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-11-23 03:58:41,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-23 03:58:42,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:58:42,131 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:58:42,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:42,131 INFO L85 PathProgramCache]: Analyzing trace with hash 823875782, now seen corresponding path program 1 times [2021-11-23 03:58:42,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:58:42,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1828194579] [2021-11-23 03:58:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:42,131 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:58:42,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:58:42,132 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:58:42,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 03:58:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:42,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:58:42,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:58:42,353 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:58:42,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-23 03:58:42,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2021-11-23 03:58:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-11-23 03:58:43,041 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 03:58:43,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 50 [2021-11-23 03:58:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:58:43,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:58:45,781 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:58:45,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:58:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:58:45,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:58:45,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1828194579] [2021-11-23 03:58:45,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1828194579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:58:45,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [774699368] [2021-11-23 03:58:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:45,802 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:58:45,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:58:45,806 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:58:45,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-23 03:58:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:45,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 03:58:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:58:45,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-23 03:58:46,024 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:58:46,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-11-23 03:58:46,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:58:46,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-23 03:58:46,634 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:58:46,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2021-11-23 03:58:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:58:46,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:58:49,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 03:58:49,129 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:58:49,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:58:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:58:49,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [774699368] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:58:49,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916789825] [2021-11-23 03:58:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:49,150 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:58:49,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:58:49,151 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:58:49,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-23 03:58:49,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 03:58:49,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:58:49,247 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:58:49,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-11-23 03:58:49,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 03:58:49,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2021-11-23 03:58:49,431 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:58:49,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2021-11-23 03:58:49,605 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:58:49,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:58:51,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 03:58:51,839 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:58:51,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 03:58:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:58:51,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916789825] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:58:51,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:58:51,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12, 12, 12, 12] total 28 [2021-11-23 03:58:51,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952898677] [2021-11-23 03:58:51,861 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:58:51,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-23 03:58:51,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:58:51,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-23 03:58:51,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=718, Unknown=1, NotChecked=0, Total=812 [2021-11-23 03:58:51,863 INFO L87 Difference]: Start difference. First operand 131 states and 144 transitions. Second operand has 29 states, 28 states have (on average 2.642857142857143) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:58:52,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:58:52,410 INFO L93 Difference]: Finished difference Result 130 states and 142 transitions. [2021-11-23 03:58:52,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:58:52,411 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.642857142857143) internal successors, (74), 29 states have internal predecessors, (74), 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 33 [2021-11-23 03:58:52,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:58:52,412 INFO L225 Difference]: With dead ends: 130 [2021-11-23 03:58:52,412 INFO L226 Difference]: Without dead ends: 130 [2021-11-23 03:58:52,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 152 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=106, Invalid=823, Unknown=1, NotChecked=0, Total=930 [2021-11-23 03:58:52,414 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 31 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:58:52,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 575 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 291 Invalid, 0 Unknown, 49 Unchecked, 0.5s Time] [2021-11-23 03:58:52,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-23 03:58:52,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2021-11-23 03:58:52,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 111 states have (on average 1.2792792792792793) internal successors, (142), 129 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:58:52,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2021-11-23 03:58:52,419 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 33 [2021-11-23 03:58:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:58:52,419 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2021-11-23 03:58:52,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.642857142857143) internal successors, (74), 29 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:58:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2021-11-23 03:58:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:58:52,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:58:52,421 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:58:52,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-23 03:58:52,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (31)] Forceful destruction successful, exit code 0 [2021-11-23 03:58:52,844 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-23 03:58:53,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:58:53,037 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:58:53,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:58:53,037 INFO L85 PathProgramCache]: Analyzing trace with hash 823444806, now seen corresponding path program 1 times [2021-11-23 03:58:53,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:58:53,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355787597] [2021-11-23 03:58:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:58:53,038 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:58:53,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:58:53,046 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:58:53,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-11-23 03:58:53,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:58:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 03:58:53,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:58:53,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:58:53,323 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-23 03:58:53,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 51 [2021-11-23 03:58:53,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:58:53,591 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:58:53,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 50 [2021-11-23 03:58:54,025 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:58:54,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 48 [2021-11-23 03:58:54,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:58:54,246 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-11-23 03:58:54,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 82 [2021-11-23 03:58:54,801 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 03:58:54,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 93 treesize of output 61 [2021-11-23 03:58:55,053 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 03:58:55,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 43 treesize of output 46 [2021-11-23 03:58:55,180 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:58:55,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:59:04,268 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (_ bv0 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))))))))) (_ bv1 1)) (_ bv0 1))) is different from false [2021-11-23 03:59:09,615 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:59:09,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-23 03:59:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2021-11-23 03:59:09,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:59:09,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355787597] [2021-11-23 03:59:09,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355787597] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:59:09,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1742511905] [2021-11-23 03:59:09,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:09,637 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:59:09,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:59:09,638 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:59:09,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-11-23 03:59:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:09,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 03:59:09,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:10,057 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:59:10,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-11-23 03:59:10,398 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:59:10,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 03:59:10,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:59:10,790 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:59:10,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-11-23 03:59:11,207 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:59:11,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 47 [2021-11-23 03:59:11,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:59:11,447 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-11-23 03:59:11,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 59 treesize of output 59 [2021-11-23 03:59:12,298 INFO L354 Elim1Store]: treesize reduction 47, result has 7.8 percent of original size [2021-11-23 03:59:12,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 64 treesize of output 44 [2021-11-23 03:59:14,432 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:59:14,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2021-11-23 03:59:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:59:14,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:59:15,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:59:15,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 101 [2021-11-23 03:59:15,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:59:17,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:59:17,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1742511905] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:59:17,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141942275] [2021-11-23 03:59:17,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:17,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:59:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:59:17,191 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:59:17,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-23 03:59:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:17,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:59:17,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:17,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 03:59:17,324 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:59:17,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 03:59:17,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:59:17,613 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 03:59:17,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 34 [2021-11-23 03:59:20,014 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 03:59:20,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 47 [2021-11-23 03:59:20,300 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-23 03:59:20,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 63 treesize of output 63 [2021-11-23 03:59:23,064 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-11-23 03:59:23,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 39 [2021-11-23 03:59:23,147 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:59:23,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 25 [2021-11-23 03:59:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:59:23,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:59:27,434 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (_ bv0 1)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))))))) (_ bv1 1)))) is different from false [2021-11-23 03:59:27,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:59:27,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 101 [2021-11-23 03:59:29,584 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (not (= |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (select (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))) (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (= |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (select (select (let ((.cse1 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))) is different from false [2021-11-23 03:59:29,894 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 03:59:29,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 41 [2021-11-23 03:59:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-23 03:59:29,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141942275] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:59:29,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:59:29,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 18, 15, 16, 15] total 59 [2021-11-23 03:59:29,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517374428] [2021-11-23 03:59:29,924 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:59:29,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-23 03:59:29,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:59:29,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-23 03:59:29,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2917, Unknown=8, NotChecked=336, Total=3540 [2021-11-23 03:59:29,927 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 60 states, 59 states have (on average 1.9322033898305084) internal successors, (114), 60 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:48,869 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-11-23 03:59:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:59:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9322033898305084) internal successors, (114), 60 states have internal predecessors, (114), 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 33 [2021-11-23 03:59:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:48,871 INFO L225 Difference]: With dead ends: 129 [2021-11-23 03:59:48,871 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 03:59:48,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 121 SyntacticMatches, 17 SemanticMatches, 69 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 51.2s TimeCoverageRelationStatistics Valid=440, Invalid=4119, Unknown=9, NotChecked=402, Total=4970 [2021-11-23 03:59:48,873 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 38 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:48,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 1213 Invalid, 823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 546 Invalid, 0 Unknown, 269 Unchecked, 0.9s Time] [2021-11-23 03:59:48,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 03:59:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-23 03:59:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 111 states have (on average 1.2702702702702702) internal successors, (141), 128 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 141 transitions. [2021-11-23 03:59:48,879 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 141 transitions. Word has length 33 [2021-11-23 03:59:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:48,879 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 141 transitions. [2021-11-23 03:59:48,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.9322033898305084) internal successors, (114), 60 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:48,879 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 141 transitions. [2021-11-23 03:59:48,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:59:48,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:48,880 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:59:48,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-11-23 03:59:49,095 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-11-23 03:59:49,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-23 03:59:49,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:59:49,494 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:59:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash 226977724, now seen corresponding path program 1 times [2021-11-23 03:59:49,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:59:49,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [142328512] [2021-11-23 03:59:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:49,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:59:49,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:59:49,496 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:59:49,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-11-23 03:59:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:59:49,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:59:50,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:59:50,264 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:59:50,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:59:50,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [142328512] [2021-11-23 03:59:50,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [142328512] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:50,265 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:59:50,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 11 [2021-11-23 03:59:50,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344022588] [2021-11-23 03:59:50,266 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:50,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:59:50,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:59:50,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:59:50,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:59:50,267 INFO L87 Difference]: Start difference. First operand 129 states and 141 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:50,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:50,383 INFO L93 Difference]: Finished difference Result 134 states and 144 transitions. [2021-11-23 03:59:50,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:59:50,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 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 33 [2021-11-23 03:59:50,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:50,385 INFO L225 Difference]: With dead ends: 134 [2021-11-23 03:59:50,385 INFO L226 Difference]: Without dead ends: 134 [2021-11-23 03:59:50,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:59:50,386 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 58 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:50,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 364 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 78 Invalid, 0 Unknown, 83 Unchecked, 0.1s Time] [2021-11-23 03:59:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-23 03:59:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2021-11-23 03:59:50,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 111 states have (on average 1.2612612612612613) internal successors, (140), 127 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2021-11-23 03:59:50,391 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 33 [2021-11-23 03:59:50,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:50,391 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2021-11-23 03:59:50,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:50,392 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2021-11-23 03:59:50,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:59:50,392 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:50,392 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:59:50,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (36)] Forceful destruction successful, exit code 0 [2021-11-23 03:59:50,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:59:50,612 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:59:50,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:50,612 INFO L85 PathProgramCache]: Analyzing trace with hash 226963822, now seen corresponding path program 1 times [2021-11-23 03:59:50,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:59:50,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393472133] [2021-11-23 03:59:50,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:50,613 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:59:50,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:59:50,614 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:59:50,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 03:59:50,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:50,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:59:50,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:51,191 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:59:51,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:59:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:59:51,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:59:51,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1393472133] [2021-11-23 03:59:51,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1393472133] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:51,360 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:59:51,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 11 [2021-11-23 03:59:51,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056966540] [2021-11-23 03:59:51,360 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:51,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:59:51,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:59:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:59:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:59:51,361 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:51,516 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2021-11-23 03:59:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:59:51,517 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 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 33 [2021-11-23 03:59:51,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:51,518 INFO L225 Difference]: With dead ends: 133 [2021-11-23 03:59:51,518 INFO L226 Difference]: Without dead ends: 133 [2021-11-23 03:59:51,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:59:51,519 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 49 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:51,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 390 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 92 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2021-11-23 03:59:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-11-23 03:59:51,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2021-11-23 03:59:51,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 111 states have (on average 1.2432432432432432) internal successors, (138), 126 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2021-11-23 03:59:51,524 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 33 [2021-11-23 03:59:51,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:51,524 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2021-11-23 03:59:51,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:51,525 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2021-11-23 03:59:51,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 03:59:51,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:51,526 INFO L514 BasicCegarLoop]: 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] [2021-11-23 03:59:51,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 03:59:51,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:59:51,738 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:59:51,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:51,738 INFO L85 PathProgramCache]: Analyzing trace with hash -262609016, now seen corresponding path program 1 times [2021-11-23 03:59:51,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:59:51,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1316664038] [2021-11-23 03:59:51,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:51,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:59:51,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:59:51,740 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:59:51,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 03:59:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:51,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 03:59:51,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:59:52,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:59:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:59:52,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:59:52,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1316664038] [2021-11-23 03:59:52,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1316664038] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:59:52,503 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:59:52,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 11 [2021-11-23 03:59:52,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795285023] [2021-11-23 03:59:52,503 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:59:52,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:59:52,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:59:52,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:59:52,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:59:52,504 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:59:52,643 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2021-11-23 03:59:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 03:59:52,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 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 33 [2021-11-23 03:59:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:59:52,644 INFO L225 Difference]: With dead ends: 129 [2021-11-23 03:59:52,644 INFO L226 Difference]: Without dead ends: 129 [2021-11-23 03:59:52,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:59:52,645 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 69 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:59:52,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 320 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 81 Unchecked, 0.1s Time] [2021-11-23 03:59:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-23 03:59:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2021-11-23 03:59:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 125 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:52,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2021-11-23 03:59:52,650 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 33 [2021-11-23 03:59:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:59:52,650 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2021-11-23 03:59:52,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:59:52,651 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2021-11-23 03:59:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 03:59:52,651 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:59:52,652 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-23 03:59:52,663 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (38)] Ended with exit code 0 [2021-11-23 03:59:52,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:59:52,863 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr57ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 03:59:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:59:52,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1553624943, now seen corresponding path program 1 times [2021-11-23 03:59:52,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:59:52,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294364956] [2021-11-23 03:59:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:59:52,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:59:52,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:59:52,865 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:59:52,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 03:59:52,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:59:52,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 03:59:52,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:59:53,056 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:59:53,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 30 [2021-11-23 03:59:53,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-23 03:59:53,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-11-23 03:59:53,629 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 03:59:53,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 54 [2021-11-23 03:59:53,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:59:53,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:00,178 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 04:00:00,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 04:00:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:00,198 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 04:00:00,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294364956] [2021-11-23 04:00:00,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294364956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:00:00,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [398068414] [2021-11-23 04:00:00,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:00,198 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 04:00:00,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 04:00:00,199 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 04:00:00,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-23 04:00:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:00,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 04:00:00,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:00:00,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-23 04:00:00,390 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 04:00:00,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-23 04:00:00,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-23 04:00:00,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 30 [2021-11-23 04:00:00,795 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 04:00:00,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 53 [2021-11-23 04:00:00,907 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:00,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:03,088 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 04:00:03,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 04:00:03,107 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:03,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [398068414] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:00:03,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052817132] [2021-11-23 04:00:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:03,107 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:00:03,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:00:03,108 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:00:03,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-23 04:00:03,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:03,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 04:00:03,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:00:03,209 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 04:00:03,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-23 04:00:03,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 04:00:03,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 04:00:05,651 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 04:00:05,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 24 [2021-11-23 04:00:05,757 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:05,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:05,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 04:00:06,124 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 04:00:06,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 04:00:06,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:06,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052817132] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:00:06,150 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 04:00:06,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 29 [2021-11-23 04:00:06,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919663328] [2021-11-23 04:00:06,150 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 04:00:06,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 04:00:06,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 04:00:06,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 04:00:06,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=774, Unknown=3, NotChecked=0, Total=870 [2021-11-23 04:00:06,151 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 04:00:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:00:06,491 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-11-23 04:00:06,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 04:00:06,499 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 30 states have internal predecessors, (80), 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 34 [2021-11-23 04:00:06,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:00:06,500 INFO L225 Difference]: With dead ends: 125 [2021-11-23 04:00:06,500 INFO L226 Difference]: Without dead ends: 125 [2021-11-23 04:00:06,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=106, Invalid=883, Unknown=3, NotChecked=0, Total=992 [2021-11-23 04:00:06,501 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 23 mSDsluCounter, 725 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 04:00:06,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 789 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 150 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2021-11-23 04:00:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-23 04:00:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2021-11-23 04:00:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 124 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 04:00:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 136 transitions. [2021-11-23 04:00:06,505 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 136 transitions. Word has length 34 [2021-11-23 04:00:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:00:06,505 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 136 transitions. [2021-11-23 04:00:06,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 04:00:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 136 transitions. [2021-11-23 04:00:06,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 04:00:06,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:00:06,506 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-23 04:00:06,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-23 04:00:06,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (39)] Forceful destruction successful, exit code 0 [2021-11-23 04:00:06,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-11-23 04:00:07,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 04:00:07,117 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr51ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 04:00:07,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:00:07,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1554055919, now seen corresponding path program 1 times [2021-11-23 04:00:07,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 04:00:07,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [208873935] [2021-11-23 04:00:07,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:07,118 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 04:00:07,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 04:00:07,119 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 04:00:07,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Waiting until timeout for monitored process [2021-11-23 04:00:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:07,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 04:00:07,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:00:07,279 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 04:00:07,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-11-23 04:00:07,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-23 04:00:07,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-11-23 04:00:07,936 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 04:00:07,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 51 [2021-11-23 04:00:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:08,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:14,517 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 04:00:14,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 04:00:14,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:14,539 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 04:00:14,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [208873935] [2021-11-23 04:00:14,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [208873935] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:00:14,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [331980641] [2021-11-23 04:00:14,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:14,539 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 04:00:14,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 04:00:14,540 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 04:00:14,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2021-11-23 04:00:14,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:14,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 04:00:14,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:00:14,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-11-23 04:00:14,725 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 04:00:14,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-23 04:00:14,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2021-11-23 04:00:14,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 34 [2021-11-23 04:00:15,111 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 04:00:15,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 52 [2021-11-23 04:00:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:15,226 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:21,483 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 04:00:21,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 04:00:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:21,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [331980641] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:00:21,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106798595] [2021-11-23 04:00:21,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:21,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:00:21,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:00:21,506 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:00:21,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-23 04:00:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:21,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-23 04:00:21,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:00:21,598 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 04:00:21,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 04:00:21,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-23 04:00:21,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-23 04:00:22,003 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 04:00:22,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2021-11-23 04:00:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:22,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:24,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2021-11-23 04:00:24,543 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 04:00:24,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-23 04:00:24,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:24,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106798595] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:00:24,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 04:00:24,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 29 [2021-11-23 04:00:24,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003787510] [2021-11-23 04:00:24,564 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 04:00:24,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 04:00:24,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 04:00:24,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 04:00:24,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=774, Unknown=3, NotChecked=0, Total=870 [2021-11-23 04:00:24,565 INFO L87 Difference]: Start difference. First operand 125 states and 136 transitions. Second operand has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 04:00:24,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:00:24,922 INFO L93 Difference]: Finished difference Result 124 states and 134 transitions. [2021-11-23 04:00:24,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 04:00:24,923 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 30 states have internal predecessors, (80), 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 34 [2021-11-23 04:00:24,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:00:24,924 INFO L225 Difference]: With dead ends: 124 [2021-11-23 04:00:24,924 INFO L226 Difference]: Without dead ends: 124 [2021-11-23 04:00:24,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 152 SyntacticMatches, 18 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=97, Invalid=830, Unknown=3, NotChecked=0, Total=930 [2021-11-23 04:00:24,925 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 16 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 04:00:24,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 788 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2021-11-23 04:00:24,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-23 04:00:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-11-23 04:00:24,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 111 states have (on average 1.2072072072072073) internal successors, (134), 123 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 04:00:24,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-11-23 04:00:24,930 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 34 [2021-11-23 04:00:24,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:00:24,930 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-11-23 04:00:24,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 30 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 04:00:24,931 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-11-23 04:00:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 04:00:24,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:00:24,932 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-23 04:00:24,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2021-11-23 04:00:25,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (42)] Forceful destruction successful, exit code 0 [2021-11-23 04:00:25,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-23 04:00:25,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:00:25,537 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 04:00:25,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:00:25,538 INFO L85 PathProgramCache]: Analyzing trace with hash 449486225, now seen corresponding path program 1 times [2021-11-23 04:00:25,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 04:00:25,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [506463710] [2021-11-23 04:00:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:25,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 04:00:25,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 04:00:25,540 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 04:00:25,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-11-23 04:00:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:25,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 04:00:25,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:00:25,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 04:00:25,765 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 04:00:25,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-11-23 04:00:26,000 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-11-23 04:00:26,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 51 [2021-11-23 04:00:26,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 04:00:26,277 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 04:00:26,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 48 [2021-11-23 04:00:26,646 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 04:00:26,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 58 [2021-11-23 04:00:26,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:00:26,861 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-11-23 04:00:26,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 83 treesize of output 79 [2021-11-23 04:00:28,023 INFO L354 Elim1Store]: treesize reduction 47, result has 7.8 percent of original size [2021-11-23 04:00:28,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 76 [2021-11-23 04:00:28,431 INFO L354 Elim1Store]: treesize reduction 46, result has 27.0 percent of original size [2021-11-23 04:00:28,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 70 treesize of output 79 [2021-11-23 04:00:29,034 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:29,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:32,262 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 04:00:32,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 69 [2021-11-23 04:00:32,341 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-23 04:00:32,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 69 treesize of output 77 [2021-11-23 04:00:32,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 04:00:32,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 04:00:32,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2021-11-23 04:00:32,597 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-11-23 04:00:32,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 99 [2021-11-23 04:00:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:45,955 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 04:00:45,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [506463710] [2021-11-23 04:00:45,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [506463710] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:00:45,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1695637526] [2021-11-23 04:00:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:00:45,956 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 04:00:45,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 04:00:45,964 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 04:00:45,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-11-23 04:00:46,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:00:46,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 04:00:46,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:00:46,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 04:00:46,200 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 04:00:46,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2021-11-23 04:00:46,407 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 04:00:46,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 27 treesize of output 29 [2021-11-23 04:00:46,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 04:00:46,715 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 04:00:46,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 04:00:47,149 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 04:00:47,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-11-23 04:00:47,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:00:47,365 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-11-23 04:00:47,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 57 [2021-11-23 04:00:48,430 INFO L354 Elim1Store]: treesize reduction 47, result has 7.8 percent of original size [2021-11-23 04:00:48,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 42 [2021-11-23 04:00:48,581 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 04:00:48,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 30 [2021-11-23 04:00:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:00:48,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:00:49,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-23 04:01:05,351 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 04:01:05,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 50 [2021-11-23 04:01:05,407 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-23 04:01:05,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 58 [2021-11-23 04:01:05,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 04:01:05,473 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 04:01:05,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-11-23 04:01:05,583 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-11-23 04:01:05,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 67 [2021-11-23 04:01:19,599 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:01:19,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1695637526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:01:19,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352865039] [2021-11-23 04:01:19,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:01:19,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:01:19,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:01:19,600 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:01:19,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-23 04:01:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:01:19,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 04:01:19,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:01:19,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 04:01:21,944 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 04:01:21,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 26 [2021-11-23 04:01:22,331 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-23 04:01:22,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 32 [2021-11-23 04:01:22,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 04:01:22,657 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 04:01:22,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-11-23 04:01:23,056 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 04:01:23,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-11-23 04:01:23,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:01:23,316 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-11-23 04:01:23,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 61 treesize of output 61 [2021-11-23 04:01:24,465 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 04:01:24,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 42 [2021-11-23 04:01:24,572 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 04:01:24,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 29 [2021-11-23 04:01:24,767 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:01:24,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:01:25,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2021-11-23 04:01:27,066 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)))) is different from false [2021-11-23 04:01:29,080 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))) is different from false [2021-11-23 04:01:31,099 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32)) (|ULTIMATE.start_dll_circular_create_~head~0#1.offset| (_ BitVec 32))) (not (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (select (store (select (let ((.cse0 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (bvadd (_ bv4 32) |ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (bvadd (_ bv4 32) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|)))) is different from false [2021-11-23 04:01:31,202 INFO L354 Elim1Store]: treesize reduction 83, result has 30.8 percent of original size [2021-11-23 04:01:31,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 50 [2021-11-23 04:01:31,251 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-23 04:01:31,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 58 [2021-11-23 04:01:31,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-11-23 04:01:31,379 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-23 04:01:31,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-11-23 04:01:31,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 04:01:31,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2021-11-23 04:01:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-23 04:01:43,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352865039] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:01:43,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 04:01:43,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19, 19, 19, 18] total 75 [2021-11-23 04:01:43,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579952018] [2021-11-23 04:01:43,939 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 04:01:43,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-23 04:01:43,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 04:01:43,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-23 04:01:43,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=4795, Unknown=17, NotChecked=432, Total=5700 [2021-11-23 04:01:43,942 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 76 states, 75 states have (on average 1.76) internal successors, (132), 76 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 04:01:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 04:01:44,645 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2021-11-23 04:01:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 04:01:44,645 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.76) internal successors, (132), 76 states have internal predecessors, (132), 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 34 [2021-11-23 04:01:44,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 04:01:44,646 INFO L225 Difference]: With dead ends: 123 [2021-11-23 04:01:44,646 INFO L226 Difference]: Without dead ends: 123 [2021-11-23 04:01:44,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 108 SyntacticMatches, 20 SemanticMatches, 76 ConstructedPredicates, 3 IntricatePredicates, 2 DeprecatedPredicates, 3576 ImplicationChecksByTransitivity, 71.8s TimeCoverageRelationStatistics Valid=495, Invalid=5050, Unknown=17, NotChecked=444, Total=6006 [2021-11-23 04:01:44,649 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 28 mSDsluCounter, 1455 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1514 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 525 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 04:01:44,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 1514 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 141 Invalid, 0 Unknown, 525 Unchecked, 0.3s Time] [2021-11-23 04:01:44,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-23 04:01:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2021-11-23 04:01:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 111 states have (on average 1.1981981981981982) internal successors, (133), 122 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 04:01:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2021-11-23 04:01:44,653 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 34 [2021-11-23 04:01:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 04:01:44,653 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2021-11-23 04:01:44,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.76) internal successors, (132), 76 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 04:01:44,654 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2021-11-23 04:01:44,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 04:01:44,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 04:01:44,654 INFO L514 BasicCegarLoop]: 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, 1] [2021-11-23 04:01:44,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-23 04:01:44,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-11-23 04:01:45,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (46)] Forceful destruction successful, exit code 0 [2021-11-23 04:01:45,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 04:01:45,255 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 55 more)] === [2021-11-23 04:01:45,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 04:01:45,255 INFO L85 PathProgramCache]: Analyzing trace with hash 449055249, now seen corresponding path program 1 times [2021-11-23 04:01:45,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 04:01:45,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1330376390] [2021-11-23 04:01:45,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:01:45,256 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 04:01:45,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 04:01:45,257 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 04:01:45,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-11-23 04:01:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:01:45,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 04:01:45,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:01:45,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 04:01:45,515 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-23 04:01:45,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 32 treesize of output 49 [2021-11-23 04:01:45,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 04:01:45,800 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 04:01:45,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 44 [2021-11-23 04:01:46,085 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 04:01:46,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 58 [2021-11-23 04:01:48,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:01:48,280 INFO L354 Elim1Store]: treesize reduction 102, result has 14.3 percent of original size [2021-11-23 04:01:48,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 90 [2021-11-23 04:01:48,942 INFO L354 Elim1Store]: treesize reduction 66, result has 1.5 percent of original size [2021-11-23 04:01:48,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 72 [2021-11-23 04:01:49,260 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 04:01:49,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 57 [2021-11-23 04:01:49,577 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:01:49,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:01:58,027 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (_ bv0 1)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))))))))))))))) (_ bv0 1))) is different from false [2021-11-23 04:02:00,037 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) (_ bv0 1)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))))))))))))))))))) is different from false [2021-11-23 04:02:02,046 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select (store |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) (_ bv0 1)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))))))))))))))))))) is different from false [2021-11-23 04:02:12,955 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 04:02:12,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 40 [2021-11-23 04:02:12,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-23 04:02:12,975 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 04:02:12,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1330376390] [2021-11-23 04:02:12,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1330376390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:02:12,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1531371000] [2021-11-23 04:02:12,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:02:12,976 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 04:02:12,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 04:02:12,976 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 04:02:12,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-11-23 04:02:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:02:13,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-23 04:02:13,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:02:13,405 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 04:02:13,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-11-23 04:02:13,755 INFO L354 Elim1Store]: treesize reduction 38, result has 39.7 percent of original size [2021-11-23 04:02:13,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 48 [2021-11-23 04:02:13,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 04:02:14,204 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 04:02:14,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 45 [2021-11-23 04:02:14,826 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 04:02:14,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 59 [2021-11-23 04:02:15,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 04:02:15,104 INFO L354 Elim1Store]: treesize reduction 71, result has 11.3 percent of original size [2021-11-23 04:02:15,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 94 treesize of output 94 [2021-11-23 04:02:15,914 INFO L354 Elim1Store]: treesize reduction 47, result has 7.8 percent of original size [2021-11-23 04:02:15,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 100 treesize of output 76 [2021-11-23 04:02:16,210 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 04:02:16,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 56 [2021-11-23 04:02:16,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:02:16,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:02:40,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:02:40,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1531371000] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 04:02:40,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410181130] [2021-11-23 04:02:40,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 04:02:40,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 04:02:40,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 04:02:40,135 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 04:02:40,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3b35fd64-cf6d-4adf-90b4-0417e4144aeb/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-23 04:02:40,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 04:02:40,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 04:02:40,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 04:02:40,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 04:02:40,304 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 04:02:40,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 19 [2021-11-23 04:02:40,369 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 04:02:40,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 04:02:44,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 04:02:44,637 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-23 04:02:44,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 24 [2021-11-23 04:02:44,978 INFO L354 Elim1Store]: treesize reduction 45, result has 16.7 percent of original size [2021-11-23 04:02:44,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 34 [2021-11-23 04:02:45,231 INFO L354 Elim1Store]: treesize reduction 122, result has 16.4 percent of original size [2021-11-23 04:02:45,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 50 [2021-11-23 04:02:46,144 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-11-23 04:02:46,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 24 [2021-11-23 04:02:48,267 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 04:02:48,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2021-11-23 04:02:48,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 04:02:48,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 04:02:52,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 04:02:54,972 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|))) is different from false [2021-11-23 04:02:56,985 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_dll_circular_create_~last~0#1.offset| (_ BitVec 32))) (not (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|))) is different from false