./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/verifythis/duplets.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/verifythis/duplets.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:32:38,761 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:32:38,763 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:32:38,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:32:38,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:32:38,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:32:38,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:32:38,793 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:32:38,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:32:38,797 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:32:38,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:32:38,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:32:38,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:32:38,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:32:38,803 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:32:38,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:32:38,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:32:38,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:32:38,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:32:38,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:32:38,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:32:38,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:32:38,828 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:32:38,829 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:32:38,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:32:38,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:32:38,834 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:32:38,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:32:38,835 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:32:38,837 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:32:38,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:32:38,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:32:38,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:32:38,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:32:38,847 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:32:38,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:32:38,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:32:38,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:32:38,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:32:38,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:32:38,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:32:38,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-23 14:32:38,903 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:32:38,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:32:38,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:32:38,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:32:38,905 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:32:38,905 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:32:38,906 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:32:38,906 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:32:38,906 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:32:38,906 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:32:38,907 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:32:38,908 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:32:38,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:32:38,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:32:38,908 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:32:38,909 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:32:38,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:32:38,909 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:32:38,910 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 14:32:38,910 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 14:32:38,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:32:38,910 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:32:38,911 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-23 14:32:38,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:32:38,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:32:38,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:32:38,912 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-23 14:32:38,912 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-23 14:32:38,912 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-23 14:32:38,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:32:38,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-23 14:32:38,913 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:32:38,913 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:32:38,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:32:38,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:32:38,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:32:38,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:32:38,915 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:32:38,915 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:32:38,915 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:32:38,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:32:38,915 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:32:38,916 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ac76721ba91522692e2c3e4d1ea27df0200031dd012c5066cc7280e0ae6e2244 [2022-11-23 14:32:39,230 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:32:39,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:32:39,267 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:32:39,268 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:32:39,269 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:32:39,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/verifythis/duplets.c [2022-11-23 14:32:42,446 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:32:42,714 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:32:42,715 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/sv-benchmarks/c/verifythis/duplets.c [2022-11-23 14:32:42,723 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/data/753257d95/ed0f748f97e34e62ae6976cb9e339468/FLAGc435bd507 [2022-11-23 14:32:42,743 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/data/753257d95/ed0f748f97e34e62ae6976cb9e339468 [2022-11-23 14:32:42,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:32:42,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:32:42,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:32:42,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:32:42,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:32:42,765 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:42" (1/1) ... [2022-11-23 14:32:42,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ef91b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:42, skipping insertion in model container [2022-11-23 14:32:42,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:32:42" (1/1) ... [2022-11-23 14:32:42,775 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:32:42,794 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:32:43,000 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-23 14:32:43,029 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:32:43,041 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:32:43,053 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/sv-benchmarks/c/verifythis/duplets.c[485,498] [2022-11-23 14:32:43,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:32:43,081 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:32:43,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43 WrapperNode [2022-11-23 14:32:43,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:32:43,083 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:32:43,083 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:32:43,083 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:32:43,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,114 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,145 INFO L138 Inliner]: procedures = 21, calls = 43, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 123 [2022-11-23 14:32:43,146 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:32:43,146 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:32:43,146 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:32:43,147 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:32:43,155 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,155 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,158 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,158 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,171 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:32:43,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:32:43,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:32:43,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:32:43,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (1/1) ... [2022-11-23 14:32:43,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:32:43,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:43,221 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:32:43,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:32:43,264 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:32:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-23 14:32:43,265 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-23 14:32:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:32:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:32:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:32:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:32:43,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:32:43,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:32:43,266 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:32:43,266 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 14:32:43,266 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 14:32:43,266 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:32:43,357 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:32:43,359 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:32:43,968 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:32:44,030 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:32:44,035 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:32:44,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:44 BoogieIcfgContainer [2022-11-23 14:32:44,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:32:44,042 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:32:44,042 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:32:44,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:32:44,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:32:42" (1/3) ... [2022-11-23 14:32:44,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543a8f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:44, skipping insertion in model container [2022-11-23 14:32:44,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:32:43" (2/3) ... [2022-11-23 14:32:44,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@543a8f71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:32:44, skipping insertion in model container [2022-11-23 14:32:44,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:44" (3/3) ... [2022-11-23 14:32:44,054 INFO L112 eAbstractionObserver]: Analyzing ICFG duplets.c [2022-11-23 14:32:44,075 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:32:44,076 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 37 error locations. [2022-11-23 14:32:44,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:32:44,153 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3f052ae1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:32:44,154 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2022-11-23 14:32:44,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:32:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:32:44,167 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:44,168 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:44,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:32:44,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:44,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551543, now seen corresponding path program 1 times [2022-11-23 14:32:44,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:44,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336363983] [2022-11-23 14:32:44,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:44,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:44,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:32:44,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:44,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336363983] [2022-11-23 14:32:44,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336363983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:44,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:32:44,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:32:44,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436915570] [2022-11-23 14:32:44,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:44,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:32:44,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:44,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:32:44,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:32:44,756 INFO L87 Difference]: Start difference. First operand has 87 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 75 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:32:44,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:44,942 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2022-11-23 14:32:44,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:32:44,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 16 [2022-11-23 14:32:44,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:44,955 INFO L225 Difference]: With dead ends: 85 [2022-11-23 14:32:44,955 INFO L226 Difference]: Without dead ends: 84 [2022-11-23 14:32:44,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:32:44,961 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 65 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:44,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 62 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:32:44,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-23 14:32:45,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-23 14:32:45,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 38 states have (on average 2.026315789473684) internal successors, (77), 72 states have internal predecessors, (77), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:32:45,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-11-23 14:32:45,006 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 16 [2022-11-23 14:32:45,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:45,007 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-11-23 14:32:45,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:32:45,008 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-11-23 14:32:45,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:32:45,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:45,010 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:45,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:32:45,010 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:32:45,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:45,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1311551544, now seen corresponding path program 1 times [2022-11-23 14:32:45,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:45,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9487666] [2022-11-23 14:32:45,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:45,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:45,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:32:45,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:45,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9487666] [2022-11-23 14:32:45,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9487666] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779760415] [2022-11-23 14:32:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:45,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:45,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:45,491 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:45,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:32:45,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:45,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 14:32:45,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:45,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:32:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:32:46,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:32:46,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779760415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:46,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [346170383] [2022-11-23 14:32:46,598 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2022-11-23 14:32:46,598 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:32:46,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:32:46,608 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:32:46,609 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:32:46,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:46,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:32:46,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:46,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:46,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:46,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:32:46,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:46,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:46,862 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:46,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:46,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:46,962 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:46,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:47,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,182 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:47,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:47,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,301 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:47,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:47,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,551 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:47,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:47,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,684 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:47,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:47,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,889 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:47,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:47,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:47,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:48,016 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:48,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:48,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:48,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:48,118 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:48,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:48,161 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:32:48,181 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:32:50,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [346170383] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:50,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:32:50,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5, 8, 5] total 22 [2022-11-23 14:32:50,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356574466] [2022-11-23 14:32:50,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:50,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:32:50,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:50,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:32:50,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:32:50,535 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:32:51,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:51,119 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-11-23 14:32:51,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:32:51,120 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2022-11-23 14:32:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:51,121 INFO L225 Difference]: With dead ends: 83 [2022-11-23 14:32:51,121 INFO L226 Difference]: Without dead ends: 83 [2022-11-23 14:32:51,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:32:51,123 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 87 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:51,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 193 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:32:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-23 14:32:51,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-11-23 14:32:51,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 38 states have (on average 2.0) internal successors, (76), 71 states have internal predecessors, (76), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:32:51,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 94 transitions. [2022-11-23 14:32:51,132 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 94 transitions. Word has length 16 [2022-11-23 14:32:51,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:51,133 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 94 transitions. [2022-11-23 14:32:51,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:32:51,133 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 94 transitions. [2022-11-23 14:32:51,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:32:51,134 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:51,134 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:51,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:51,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:51,339 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:32:51,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 2003392154, now seen corresponding path program 1 times [2022-11-23 14:32:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:51,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54510775] [2022-11-23 14:32:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:32:51,569 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54510775] [2022-11-23 14:32:51,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54510775] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:32:51,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686346173] [2022-11-23 14:32:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:51,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:51,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:32:51,571 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:32:51,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:32:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:51,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:32:51,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:32:51,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2022-11-23 14:32:52,300 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:32:52,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:32:52,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-23 14:32:52,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686346173] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:32:52,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1491225968] [2022-11-23 14:32:53,011 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2022-11-23 14:32:53,012 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:32:53,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:32:53,012 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:32:53,012 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:32:53,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:32:53,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:32:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,183 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:53,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:53,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,284 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:53,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:53,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,436 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:53,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:53,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,547 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:53,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:53,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,719 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:53,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:53,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,845 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:53,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:53,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:32:53,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:53,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:32:54,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:54,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:54,091 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:54,092 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:54,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:54,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:54,169 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:54,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:54,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:54,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:32:54,243 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:32:54,243 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:32:54,275 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:32:54,293 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:32:57,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [1491225968] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:57,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:32:57,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [5, 8, 7] total 26 [2022-11-23 14:32:57,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228781811] [2022-11-23 14:32:57,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:57,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 14:32:57,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 14:32:57,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:32:57,051 INFO L87 Difference]: Start difference. First operand 83 states and 94 transitions. Second operand has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:32:57,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:57,829 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2022-11-23 14:32:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:32:57,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2022-11-23 14:32:57,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:57,831 INFO L225 Difference]: With dead ends: 82 [2022-11-23 14:32:57,831 INFO L226 Difference]: Without dead ends: 82 [2022-11-23 14:32:57,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:32:57,832 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 87 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:57,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 205 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:32:57,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-23 14:32:57,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-11-23 14:32:57,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 70 states have internal predecessors, (75), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:32:57,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 93 transitions. [2022-11-23 14:32:57,842 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 93 transitions. Word has length 17 [2022-11-23 14:32:57,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:57,842 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 93 transitions. [2022-11-23 14:32:57,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 6 states have (on average 1.0) internal successors, (6), 6 states have internal predecessors, (6), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:32:57,842 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 93 transitions. [2022-11-23 14:32:57,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:32:57,843 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:57,843 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:57,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:32:58,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:32:58,059 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:32:58,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash 194668906, now seen corresponding path program 1 times [2022-11-23 14:32:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:58,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78642474] [2022-11-23 14:32:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:58,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:32:58,337 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:58,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78642474] [2022-11-23 14:32:58,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78642474] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:58,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:32:58,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:32:58,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17860426] [2022-11-23 14:32:58,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:58,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:32:58,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:32:58,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:32:58,340 INFO L87 Difference]: Start difference. First operand 82 states and 93 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:32:58,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:58,483 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-11-23 14:32:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:32:58,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-23 14:32:58,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:58,484 INFO L225 Difference]: With dead ends: 77 [2022-11-23 14:32:58,484 INFO L226 Difference]: Without dead ends: 77 [2022-11-23 14:32:58,485 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:32:58,486 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 112 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:58,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 64 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:32:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-23 14:32:58,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-11-23 14:32:58,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 38 states have (on average 1.8421052631578947) internal successors, (70), 65 states have internal predecessors, (70), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:32:58,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2022-11-23 14:32:58,493 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 20 [2022-11-23 14:32:58,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:58,493 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2022-11-23 14:32:58,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:32:58,494 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2022-11-23 14:32:58,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-23 14:32:58,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:58,495 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:58,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:32:58,495 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:32:58,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:58,496 INFO L85 PathProgramCache]: Analyzing trace with hash 194668907, now seen corresponding path program 1 times [2022-11-23 14:32:58,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:58,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799097001] [2022-11-23 14:32:58,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:58,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:32:58,766 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:58,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799097001] [2022-11-23 14:32:58,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799097001] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:58,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:32:58,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 14:32:58,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789893619] [2022-11-23 14:32:58,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:58,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:32:58,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:32:58,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:32:58,771 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:32:59,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:32:59,018 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2022-11-23 14:32:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:32:59,019 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 20 [2022-11-23 14:32:59,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:32:59,021 INFO L225 Difference]: With dead ends: 134 [2022-11-23 14:32:59,021 INFO L226 Difference]: Without dead ends: 134 [2022-11-23 14:32:59,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:32:59,022 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 170 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:32:59,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 93 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:32:59,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-23 14:32:59,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 81. [2022-11-23 14:32:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 43 states have (on average 1.813953488372093) internal successors, (78), 69 states have internal predecessors, (78), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:32:59,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-11-23 14:32:59,031 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 20 [2022-11-23 14:32:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:32:59,032 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-11-23 14:32:59,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:32:59,032 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-11-23 14:32:59,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 14:32:59,033 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:32:59,033 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:32:59,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 14:32:59,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:32:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:32:59,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1739768799, now seen corresponding path program 1 times [2022-11-23 14:32:59,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:32:59,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455117773] [2022-11-23 14:32:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:32:59,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:32:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:32:59,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:32:59,736 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:32:59,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455117773] [2022-11-23 14:32:59,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455117773] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:32:59,736 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:32:59,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:32:59,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134418155] [2022-11-23 14:32:59,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:32:59,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:32:59,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:32:59,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:32:59,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:32:59,738 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:33:01,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:01,083 INFO L93 Difference]: Finished difference Result 237 states and 272 transitions. [2022-11-23 14:33:01,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:33:01,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 21 [2022-11-23 14:33:01,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:01,085 INFO L225 Difference]: With dead ends: 237 [2022-11-23 14:33:01,085 INFO L226 Difference]: Without dead ends: 237 [2022-11-23 14:33:01,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:33:01,086 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 538 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:01,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [539 Valid, 195 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:33:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-11-23 14:33:01,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 84. [2022-11-23 14:33:01,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.7826086956521738) internal successors, (82), 72 states have internal predecessors, (82), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:33:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2022-11-23 14:33:01,095 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 21 [2022-11-23 14:33:01,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:01,096 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2022-11-23 14:33:01,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 9 states have internal predecessors, (11), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 14:33:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2022-11-23 14:33:01,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:33:01,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:01,097 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:01,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 14:33:01,097 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:33:01,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:01,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1292239534, now seen corresponding path program 1 times [2022-11-23 14:33:01,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:01,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776604642] [2022-11-23 14:33:01,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:01,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:01,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:33:01,201 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:01,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776604642] [2022-11-23 14:33:01,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776604642] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:01,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880929996] [2022-11-23 14:33:01,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:01,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:01,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:01,203 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:01,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:33:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:01,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:33:01,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:01,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:33:01,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:01,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:33:01,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880929996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:01,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [105761712] [2022-11-23 14:33:01,433 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-11-23 14:33:01,433 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:01,434 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:01,434 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:01,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:33:01,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,535 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:33:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,594 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:01,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:01,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,663 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:01,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:01,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,813 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:01,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:01,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:01,903 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:01,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:02,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,066 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:02,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:02,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,158 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:02,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:02,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:02,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:33:02,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:02,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:33:02,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:02,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:33:02,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,649 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:02,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,727 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:02,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:02,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:02,797 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:02,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:02,824 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:33:02,838 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:06,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [105761712] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:06,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:06,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 6, 6] total 20 [2022-11-23 14:33:06,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658369191] [2022-11-23 14:33:06,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:06,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:33:06,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:06,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:33:06,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:33:06,244 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:33:08,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:08,074 INFO L93 Difference]: Finished difference Result 115 states and 135 transitions. [2022-11-23 14:33:08,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-23 14:33:08,075 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 23 [2022-11-23 14:33:08,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:08,076 INFO L225 Difference]: With dead ends: 115 [2022-11-23 14:33:08,076 INFO L226 Difference]: Without dead ends: 110 [2022-11-23 14:33:08,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-11-23 14:33:08,077 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 111 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:08,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 248 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-11-23 14:33:08,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-11-23 14:33:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2022-11-23 14:33:08,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 64 states have (on average 1.609375) internal successors, (103), 91 states have internal predecessors, (103), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:33:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2022-11-23 14:33:08,095 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 23 [2022-11-23 14:33:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:08,096 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2022-11-23 14:33:08,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:33:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2022-11-23 14:33:08,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 14:33:08,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:08,097 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:08,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:08,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-23 14:33:08,304 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:33:08,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1897490764, now seen corresponding path program 1 times [2022-11-23 14:33:08,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:08,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472688428] [2022-11-23 14:33:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:08,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:33:08,359 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472688428] [2022-11-23 14:33:08,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472688428] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137511082] [2022-11-23 14:33:08,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:08,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:08,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:08,362 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:08,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:33:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:08,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:33:08,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:33:08,468 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:33:08,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137511082] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:08,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:33:08,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-11-23 14:33:08,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237926748] [2022-11-23 14:33:08,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:08,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:33:08,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:33:08,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:33:08,470 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:33:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:08,580 INFO L93 Difference]: Finished difference Result 282 states and 334 transitions. [2022-11-23 14:33:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:33:08,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 22 [2022-11-23 14:33:08,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:08,583 INFO L225 Difference]: With dead ends: 282 [2022-11-23 14:33:08,583 INFO L226 Difference]: Without dead ends: 282 [2022-11-23 14:33:08,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:33:08,584 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 182 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:08,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 264 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:08,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-11-23 14:33:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 109. [2022-11-23 14:33:08,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.606060606060606) internal successors, (106), 93 states have internal predecessors, (106), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:33:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2022-11-23 14:33:08,594 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 22 [2022-11-23 14:33:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:08,595 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2022-11-23 14:33:08,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:33:08,595 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2022-11-23 14:33:08,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:33:08,596 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:08,596 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:08,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:08,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:08,802 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:33:08,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:08,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1966086971, now seen corresponding path program 1 times [2022-11-23 14:33:08,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:08,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807063926] [2022-11-23 14:33:08,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:08,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:08,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:33:09,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:09,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807063926] [2022-11-23 14:33:09,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807063926] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:09,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:33:09,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 14:33:09,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968858099] [2022-11-23 14:33:09,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:09,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:33:09,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:33:09,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:33:09,450 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:33:10,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:10,040 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2022-11-23 14:33:10,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:33:10,041 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 25 [2022-11-23 14:33:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:10,042 INFO L225 Difference]: With dead ends: 112 [2022-11-23 14:33:10,042 INFO L226 Difference]: Without dead ends: 112 [2022-11-23 14:33:10,042 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:33:10,043 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 312 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:10,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [315 Valid, 213 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:33:10,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-11-23 14:33:10,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2022-11-23 14:33:10,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 66 states have (on average 1.5909090909090908) internal successors, (105), 93 states have internal predecessors, (105), 14 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:33:10,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2022-11-23 14:33:10,049 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 25 [2022-11-23 14:33:10,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:10,049 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2022-11-23 14:33:10,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 8 states have internal predecessors, (14), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-23 14:33:10,050 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2022-11-23 14:33:10,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:33:10,050 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:10,051 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:10,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 14:33:10,051 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:33:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:10,052 INFO L85 PathProgramCache]: Analyzing trace with hash 118458110, now seen corresponding path program 1 times [2022-11-23 14:33:10,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:10,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242080030] [2022-11-23 14:33:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:10,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:10,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:10,516 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:33:10,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:10,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242080030] [2022-11-23 14:33:10,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242080030] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:10,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294967479] [2022-11-23 14:33:10,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:10,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:10,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:10,518 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:10,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:33:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:10,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 59 conjunts are in the unsatisfiable core [2022-11-23 14:33:10,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:10,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-23 14:33:10,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-23 14:33:11,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:11,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:11,089 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-23 14:33:11,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 34 [2022-11-23 14:33:11,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 14:33:11,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-11-23 14:33:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:33:11,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:12,170 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:33:12,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 91 [2022-11-23 14:33:14,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294967479] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:14,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [811504269] [2022-11-23 14:33:14,817 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:33:14,817 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:14,817 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:14,817 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:14,817 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:14,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:14,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:14,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:14,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:33:14,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:14,902 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:33:14,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:14,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:14,958 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:14,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:15,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,030 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:15,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:15,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,182 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:15,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,269 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:15,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:15,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,428 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:15,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:15,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,527 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:15,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:15,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:15,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:33:15,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:15,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:33:15,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:15,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:33:17,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:17,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:17,035 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:17,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:17,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:17,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:17,135 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:17,135 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:17,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:17,221 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:17,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:17,250 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:33:17,265 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:26,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2767#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_finddup_~i~1#1| 0) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-23 14:33:26,870 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:26,870 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:33:26,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2022-11-23 14:33:26,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476042451] [2022-11-23 14:33:26,870 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:26,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 14:33:26,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:26,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 14:33:26,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1783, Unknown=1, NotChecked=0, Total=1980 [2022-11-23 14:33:26,872 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 14:33:30,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:30,404 INFO L93 Difference]: Finished difference Result 213 states and 254 transitions. [2022-11-23 14:33:30,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 14:33:30,405 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) Word has length 25 [2022-11-23 14:33:30,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:30,406 INFO L225 Difference]: With dead ends: 213 [2022-11-23 14:33:30,406 INFO L226 Difference]: Without dead ends: 213 [2022-11-23 14:33:30,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=380, Invalid=3041, Unknown=1, NotChecked=0, Total=3422 [2022-11-23 14:33:30,408 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 475 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:30,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 576 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-23 14:33:30,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-11-23 14:33:30,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 108. [2022-11-23 14:33:30,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 65 states have (on average 1.5692307692307692) internal successors, (102), 91 states have internal predecessors, (102), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:33:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 129 transitions. [2022-11-23 14:33:30,416 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 129 transitions. Word has length 25 [2022-11-23 14:33:30,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:30,417 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 129 transitions. [2022-11-23 14:33:30,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 20 states have internal predecessors, (29), 3 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 5 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 14:33:30,417 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 129 transitions. [2022-11-23 14:33:30,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 14:33:30,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:30,418 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:30,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-23 14:33:30,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:33:30,628 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:33:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:30,628 INFO L85 PathProgramCache]: Analyzing trace with hash -618514571, now seen corresponding path program 1 times [2022-11-23 14:33:30,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:30,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699605810] [2022-11-23 14:33:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:30,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:30,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:33:30,731 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699605810] [2022-11-23 14:33:30,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699605810] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715110602] [2022-11-23 14:33:30,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:30,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:30,733 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:30,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:33:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:30,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:33:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:33:30,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:33:30,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715110602] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:30,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [86687274] [2022-11-23 14:33:30,916 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:33:30,917 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:30,918 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:30,918 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:30,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:30,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:30,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:33:31,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:33:31,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,070 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:31,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:31,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,150 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:31,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:31,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,301 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:31,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:31,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,390 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:31,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:31,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,558 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:31,560 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:31,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,655 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:31,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:31,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,787 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:33:31,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:31,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:33:31,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:31,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:31,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:33:34,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:34,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:34,077 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:34,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:34,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:34,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:34,158 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:34,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:34,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:34,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:34,255 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:34,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:34,291 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:33:34,312 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:41,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3288#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-23 14:33:41,168 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:41,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:41,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2022-11-23 14:33:41,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317990223] [2022-11-23 14:33:41,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:41,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:33:41,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:41,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:33:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-11-23 14:33:41,170 INFO L87 Difference]: Start difference. First operand 108 states and 129 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:33:41,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:41,371 INFO L93 Difference]: Finished difference Result 366 states and 434 transitions. [2022-11-23 14:33:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:33:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 26 [2022-11-23 14:33:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:41,377 INFO L225 Difference]: With dead ends: 366 [2022-11-23 14:33:41,378 INFO L226 Difference]: Without dead ends: 366 [2022-11-23 14:33:41,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:33:41,379 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 297 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:41,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 512 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:33:41,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-11-23 14:33:41,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 118. [2022-11-23 14:33:41,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.5866666666666667) internal successors, (119), 101 states have internal predecessors, (119), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:33:41,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 146 transitions. [2022-11-23 14:33:41,405 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 146 transitions. Word has length 26 [2022-11-23 14:33:41,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:41,407 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 146 transitions. [2022-11-23 14:33:41,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:33:41,407 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 146 transitions. [2022-11-23 14:33:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 14:33:41,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:41,412 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:41,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:41,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:41,624 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:33:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:41,624 INFO L85 PathProgramCache]: Analyzing trace with hash -641204124, now seen corresponding path program 1 times [2022-11-23 14:33:41,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:41,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243317837] [2022-11-23 14:33:41,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:41,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:33:41,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:41,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243317837] [2022-11-23 14:33:41,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243317837] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:41,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081424943] [2022-11-23 14:33:41,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:41,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:41,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:41,688 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:41,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:33:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:41,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:33:41,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:41,813 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:33:41,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:33:41,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081424943] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:41,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240421100] [2022-11-23 14:33:41,857 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-23 14:33:41,857 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:41,858 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:41,859 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:41,859 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:41,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:41,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:33:41,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:41,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:41,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:41,940 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:33:41,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:41,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,001 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:42,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:42,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,096 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:42,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:42,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,236 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:42,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:42,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,329 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:42,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:42,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,489 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:42,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:42,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,590 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:42,591 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:42,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:42,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:33:42,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:42,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,785 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:33:42,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:33:42,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:42,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:33:44,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:44,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:44,718 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:44,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:44,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:44,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:44,795 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:44,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:44,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:44,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:44,866 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:44,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:44,892 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-23 14:33:44,895 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:33:44,910 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:33:51,778 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3965#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:33:51,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:33:51,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:33:51,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2022-11-23 14:33:51,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72547277] [2022-11-23 14:33:51,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:33:51,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 14:33:51,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:51,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 14:33:51,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:33:51,780 INFO L87 Difference]: Start difference. First operand 118 states and 146 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:33:51,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:51,882 INFO L93 Difference]: Finished difference Result 163 states and 195 transitions. [2022-11-23 14:33:51,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:33:51,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-23 14:33:51,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:51,884 INFO L225 Difference]: With dead ends: 163 [2022-11-23 14:33:51,884 INFO L226 Difference]: Without dead ends: 163 [2022-11-23 14:33:51,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-11-23 14:33:51,885 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 107 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:51,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 259 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:51,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-23 14:33:51,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2022-11-23 14:33:51,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 75 states have (on average 1.56) internal successors, (117), 101 states have internal predecessors, (117), 14 states have call successors, (14), 3 states have call predecessors, (14), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:33:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 144 transitions. [2022-11-23 14:33:51,892 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 144 transitions. Word has length 29 [2022-11-23 14:33:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:51,892 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 144 transitions. [2022-11-23 14:33:51,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:33:51,892 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 144 transitions. [2022-11-23 14:33:51,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-23 14:33:51,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:51,893 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:51,907 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:33:52,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:33:52,100 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:33:52,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:52,100 INFO L85 PathProgramCache]: Analyzing trace with hash 1790809280, now seen corresponding path program 1 times [2022-11-23 14:33:52,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:52,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140300542] [2022-11-23 14:33:52,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:52,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:33:52,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:52,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140300542] [2022-11-23 14:33:52,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140300542] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:33:52,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:33:52,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 14:33:52,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021258974] [2022-11-23 14:33:52,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:33:52,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:33:52,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:33:52,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:33:52,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-23 14:33:52,183 INFO L87 Difference]: Start difference. First operand 118 states and 144 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:33:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:33:52,292 INFO L93 Difference]: Finished difference Result 167 states and 198 transitions. [2022-11-23 14:33:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:33:52,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-11-23 14:33:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:33:52,293 INFO L225 Difference]: With dead ends: 167 [2022-11-23 14:33:52,294 INFO L226 Difference]: Without dead ends: 167 [2022-11-23 14:33:52,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:33:52,294 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 86 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:33:52,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 473 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:33:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-23 14:33:52,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 124. [2022-11-23 14:33:52,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 79 states have (on average 1.5316455696202531) internal successors, (121), 106 states have internal predecessors, (121), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:33:52,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 150 transitions. [2022-11-23 14:33:52,301 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 150 transitions. Word has length 29 [2022-11-23 14:33:52,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:33:52,301 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 150 transitions. [2022-11-23 14:33:52,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:33:52,302 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 150 transitions. [2022-11-23 14:33:52,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 14:33:52,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:33:52,303 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:33:52,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-23 14:33:52,303 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:33:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:33:52,304 INFO L85 PathProgramCache]: Analyzing trace with hash -284603141, now seen corresponding path program 2 times [2022-11-23 14:33:52,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:33:52,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832188834] [2022-11-23 14:33:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:33:52,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:33:52,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:33:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-23 14:33:53,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:33:53,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832188834] [2022-11-23 14:33:53,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832188834] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:33:53,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136313924] [2022-11-23 14:33:53,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:33:53,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:33:53,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:33:53,472 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:33:53,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:33:53,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:33:53,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:33:53,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjunts are in the unsatisfiable core [2022-11-23 14:33:53,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:33:53,606 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:33:54,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:33:54,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:54,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-11-23 14:33:54,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-23 14:33:54,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:54,518 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:33:54,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 62 [2022-11-23 14:33:54,886 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-23 14:33:54,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:33:57,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:33:57,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 409 treesize of output 369 [2022-11-23 14:33:59,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-23 14:33:59,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136313924] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:33:59,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [969160412] [2022-11-23 14:33:59,162 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-23 14:33:59,162 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:33:59,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:33:59,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:33:59,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:33:59,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:33:59,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:33:59,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,298 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:59,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:59,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,368 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:59,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:59,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,503 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:59,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:59,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,601 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:59,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:59,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,759 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:59,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:33:59,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:33:59,856 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:33:59,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:00,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:00,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:34:00,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:00,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:34:00,116 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:00,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:00,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:34:02,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,276 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:02,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,347 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:02,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:02,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:02,419 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:02,420 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:02,446 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-23 14:34:02,450 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:34:02,465 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:34:12,784 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4785#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:34:12,784 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:34:12,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:34:12,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 13] total 35 [2022-11-23 14:34:12,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418157047] [2022-11-23 14:34:12,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:12,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:34:12,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:12,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:34:12,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=2601, Unknown=2, NotChecked=0, Total=2862 [2022-11-23 14:34:12,787 INFO L87 Difference]: Start difference. First operand 124 states and 150 transitions. Second operand has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 14:34:18,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:18,189 INFO L93 Difference]: Finished difference Result 323 states and 382 transitions. [2022-11-23 14:34:18,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 14:34:18,190 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-23 14:34:18,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:18,192 INFO L225 Difference]: With dead ends: 323 [2022-11-23 14:34:18,192 INFO L226 Difference]: Without dead ends: 322 [2022-11-23 14:34:18,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 45 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=602, Invalid=4226, Unknown=2, NotChecked=0, Total=4830 [2022-11-23 14:34:18,194 INFO L413 NwaCegarLoop]: 98 mSDtfsCounter, 1454 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1456 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:18,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1456 Valid, 1457 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-11-23 14:34:18,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-11-23 14:34:18,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 126. [2022-11-23 14:34:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 108 states have internal predecessors, (122), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:34:18,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2022-11-23 14:34:18,203 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 31 [2022-11-23 14:34:18,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:18,203 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2022-11-23 14:34:18,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 35 states have internal predecessors, (49), 5 states have call successors, (11), 3 states have call predecessors, (11), 5 states have return successors, (10), 7 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 14:34:18,204 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2022-11-23 14:34:18,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-23 14:34:18,204 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:18,204 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:18,216 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 14:34:18,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 14:34:18,411 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:34:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:18,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1798148022, now seen corresponding path program 2 times [2022-11-23 14:34:18,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:18,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933496799] [2022-11-23 14:34:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:18,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:18,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:18,580 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:18,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:18,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933496799] [2022-11-23 14:34:18,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933496799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:18,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59450087] [2022-11-23 14:34:18,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:34:18,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:18,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:18,583 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:18,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:34:18,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:34:18,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:18,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 14:34:18,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:18,842 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:34:18,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:18,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:34:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:34:19,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59450087] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:19,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1697035513] [2022-11-23 14:34:19,065 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:34:19,065 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:19,065 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:19,065 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:19,065 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:19,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:34:19,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:34:19,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,194 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:19,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:19,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,256 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:19,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:19,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,375 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:19,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:19,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,478 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:19,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:19,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,622 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:19,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:19,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,720 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:19,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:19,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:19,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:34:19,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:19,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:34:19,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:19,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:34:22,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:22,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:22,320 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:22,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:22,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:22,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:22,393 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:22,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:22,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:22,463 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:22,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:22,490 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:34:22,504 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:34:29,595 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5479#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (not (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-23 14:34:29,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:34:29,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:34:29,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2022-11-23 14:34:29,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989389094] [2022-11-23 14:34:29,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:29,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-23 14:34:29,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:29,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-23 14:34:29,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1058, Unknown=0, NotChecked=0, Total=1260 [2022-11-23 14:34:29,597 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 14:34:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:30,599 INFO L93 Difference]: Finished difference Result 259 states and 303 transitions. [2022-11-23 14:34:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 14:34:30,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 30 [2022-11-23 14:34:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:30,605 INFO L225 Difference]: With dead ends: 259 [2022-11-23 14:34:30,605 INFO L226 Difference]: Without dead ends: 259 [2022-11-23 14:34:30,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:34:30,607 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 915 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:30,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [915 Valid, 460 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:34:30,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-11-23 14:34:30,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 125. [2022-11-23 14:34:30,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 107 states have internal predecessors, (120), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:34:30,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2022-11-23 14:34:30,614 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 30 [2022-11-23 14:34:30,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:30,615 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2022-11-23 14:34:30,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 20 states have internal predecessors, (49), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 14:34:30,615 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2022-11-23 14:34:30,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 14:34:30,616 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:30,616 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:30,628 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-23 14:34:30,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:30,823 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:34:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash -91986188, now seen corresponding path program 1 times [2022-11-23 14:34:30,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:30,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047721266] [2022-11-23 14:34:30,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:30,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:31,045 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047721266] [2022-11-23 14:34:31,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047721266] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:31,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905072502] [2022-11-23 14:34:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:31,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:31,046 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:31,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:34:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:31,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:34:31,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:31,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:31,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2022-11-23 14:34:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:31,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905072502] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:31,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [949278715] [2022-11-23 14:34:31,601 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:34:31,601 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:31,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:31,602 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:31,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:34:31,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:34:31,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,734 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:31,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:31,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,804 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:31,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:31,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:31,949 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:31,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:32,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,023 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:32,024 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:32,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,159 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:32,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:32,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,231 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:32,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:32,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:34:32,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:34:32,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:32,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:32,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:34:34,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:34,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:34,146 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:34,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:34,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:34,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:34,209 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:34,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:34,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:34,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:34,285 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:34,286 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:34,314 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:34:34,329 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:34:41,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6106#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-23 14:34:41,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:34:41,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:34:41,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-23 14:34:41,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255944877] [2022-11-23 14:34:41,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:41,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-23 14:34:41,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:41,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-23 14:34:41,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1267, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:34:41,820 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 14:34:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:43,125 INFO L93 Difference]: Finished difference Result 297 states and 341 transitions. [2022-11-23 14:34:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-23 14:34:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 31 [2022-11-23 14:34:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:43,127 INFO L225 Difference]: With dead ends: 297 [2022-11-23 14:34:43,128 INFO L226 Difference]: Without dead ends: 297 [2022-11-23 14:34:43,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=457, Invalid=2299, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 14:34:43,129 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1062 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1062 SdHoareTripleChecker+Valid, 717 SdHoareTripleChecker+Invalid, 1146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:43,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1062 Valid, 717 Invalid, 1146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:34:43,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-11-23 14:34:43,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 125. [2022-11-23 14:34:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 81 states have (on average 1.4691358024691359) internal successors, (119), 107 states have internal predecessors, (119), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:34:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 148 transitions. [2022-11-23 14:34:43,137 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 148 transitions. Word has length 31 [2022-11-23 14:34:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:43,137 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 148 transitions. [2022-11-23 14:34:43,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 14:34:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 148 transitions. [2022-11-23 14:34:43,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 14:34:43,139 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:43,139 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:43,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:43,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:34:43,346 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:34:43,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:43,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1795586004, now seen corresponding path program 1 times [2022-11-23 14:34:43,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:43,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893297136] [2022-11-23 14:34:43,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:43,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:34:43,476 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:43,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893297136] [2022-11-23 14:34:43,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893297136] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:43,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:43,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:43,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157814804] [2022-11-23 14:34:43,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:43,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:43,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:43,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:43,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:43,479 INFO L87 Difference]: Start difference. First operand 125 states and 148 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:43,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:43,538 INFO L93 Difference]: Finished difference Result 124 states and 147 transitions. [2022-11-23 14:34:43,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:43,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-23 14:34:43,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:43,541 INFO L225 Difference]: With dead ends: 124 [2022-11-23 14:34:43,541 INFO L226 Difference]: Without dead ends: 124 [2022-11-23 14:34:43,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:43,543 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:43,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 66 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:43,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-11-23 14:34:43,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-11-23 14:34:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 81 states have (on average 1.4567901234567902) internal successors, (118), 106 states have internal predecessors, (118), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:34:43,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 147 transitions. [2022-11-23 14:34:43,549 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 147 transitions. Word has length 33 [2022-11-23 14:34:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:43,550 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 147 transitions. [2022-11-23 14:34:43,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:43,550 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 147 transitions. [2022-11-23 14:34:43,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 14:34:43,551 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:43,551 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:43,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-23 14:34:43,552 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:34:43,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:43,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1795586005, now seen corresponding path program 1 times [2022-11-23 14:34:43,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:43,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503358744] [2022-11-23 14:34:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:43,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:43,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:43,712 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:34:43,712 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:43,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503358744] [2022-11-23 14:34:43,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503358744] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:43,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:43,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:43,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254657110] [2022-11-23 14:34:43,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:43,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:43,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:43,715 INFO L87 Difference]: Start difference. First operand 124 states and 147 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:43,774 INFO L93 Difference]: Finished difference Result 123 states and 146 transitions. [2022-11-23 14:34:43,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:43,775 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-23 14:34:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:43,776 INFO L225 Difference]: With dead ends: 123 [2022-11-23 14:34:43,776 INFO L226 Difference]: Without dead ends: 123 [2022-11-23 14:34:43,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:43,777 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:43,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 64 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-11-23 14:34:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-11-23 14:34:43,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 81 states have (on average 1.4444444444444444) internal successors, (117), 105 states have internal predecessors, (117), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:34:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2022-11-23 14:34:43,786 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 33 [2022-11-23 14:34:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:43,787 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2022-11-23 14:34:43,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2022-11-23 14:34:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:34:43,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:43,788 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:43,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-23 14:34:43,789 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:34:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash -171408707, now seen corresponding path program 1 times [2022-11-23 14:34:43,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:43,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279416381] [2022-11-23 14:34:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:43,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:43,879 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:34:43,879 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:43,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279416381] [2022-11-23 14:34:43,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279416381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:43,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:43,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:43,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298219250] [2022-11-23 14:34:43,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:43,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:43,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:43,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:43,882 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:43,948 INFO L93 Difference]: Finished difference Result 122 states and 145 transitions. [2022-11-23 14:34:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:43,948 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-11-23 14:34:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:43,949 INFO L225 Difference]: With dead ends: 122 [2022-11-23 14:34:43,949 INFO L226 Difference]: Without dead ends: 122 [2022-11-23 14:34:43,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:43,950 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 43 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:43,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 65 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-11-23 14:34:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-11-23 14:34:43,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 81 states have (on average 1.4320987654320987) internal successors, (116), 104 states have internal predecessors, (116), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:34:43,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 145 transitions. [2022-11-23 14:34:43,956 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 145 transitions. Word has length 34 [2022-11-23 14:34:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:43,956 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 145 transitions. [2022-11-23 14:34:43,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:43,957 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2022-11-23 14:34:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-23 14:34:43,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:43,957 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-23 14:34:43,958 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:34:43,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:43,958 INFO L85 PathProgramCache]: Analyzing trace with hash -171408706, now seen corresponding path program 1 times [2022-11-23 14:34:43,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:43,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664248821] [2022-11-23 14:34:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:44,072 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:34:44,072 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:44,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664248821] [2022-11-23 14:34:44,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664248821] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:44,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:44,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:34:44,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965593511] [2022-11-23 14:34:44,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:44,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:34:44,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:44,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:34:44,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:44,074 INFO L87 Difference]: Start difference. First operand 122 states and 145 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:44,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:44,130 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2022-11-23 14:34:44,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:34:44,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2022-11-23 14:34:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:44,131 INFO L225 Difference]: With dead ends: 121 [2022-11-23 14:34:44,131 INFO L226 Difference]: Without dead ends: 121 [2022-11-23 14:34:44,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:34:44,135 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 44 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:44,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 63 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:34:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-23 14:34:44,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-23 14:34:44,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 81 states have (on average 1.4197530864197532) internal successors, (115), 103 states have internal predecessors, (115), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:34:44,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-23 14:34:44,146 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 34 [2022-11-23 14:34:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:44,147 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-23 14:34:44,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-23 14:34:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-23 14:34:44,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:44,150 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:44,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-23 14:34:44,150 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:34:44,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:44,151 INFO L85 PathProgramCache]: Analyzing trace with hash 2081921806, now seen corresponding path program 1 times [2022-11-23 14:34:44,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:44,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225145168] [2022-11-23 14:34:44,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:44,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:44,466 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:44,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225145168] [2022-11-23 14:34:44,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225145168] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:34:44,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:34:44,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-23 14:34:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24060224] [2022-11-23 14:34:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:34:44,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 14:34:44,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 14:34:44,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-23 14:34:44,468 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:34:44,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:44,865 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2022-11-23 14:34:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:34:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-11-23 14:34:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:44,867 INFO L225 Difference]: With dead ends: 164 [2022-11-23 14:34:44,867 INFO L226 Difference]: Without dead ends: 164 [2022-11-23 14:34:44,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:34:44,868 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 142 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:44,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 388 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:34:44,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-23 14:34:44,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 123. [2022-11-23 14:34:44,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 83 states have (on average 1.4216867469879517) internal successors, (118), 104 states have internal predecessors, (118), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:34:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 147 transitions. [2022-11-23 14:34:44,874 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 147 transitions. Word has length 36 [2022-11-23 14:34:44,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:44,875 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 147 transitions. [2022-11-23 14:34:44,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:34:44,875 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 147 transitions. [2022-11-23 14:34:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:34:44,876 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:44,876 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:44,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-23 14:34:44,876 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:34:44,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:44,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1015048301, now seen corresponding path program 2 times [2022-11-23 14:34:44,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:44,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894160984] [2022-11-23 14:34:44,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:44,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:44,989 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894160984] [2022-11-23 14:34:44,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894160984] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:44,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405260435] [2022-11-23 14:34:44,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:34:44,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:44,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:44,992 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:44,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:34:45,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:34:45,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:34:45,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 14:34:45,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:34:45,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:45,504 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-23 14:34:45,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405260435] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:45,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [954528060] [2022-11-23 14:34:45,506 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-11-23 14:34:45,506 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:45,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:45,507 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:45,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:45,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:34:45,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:34:45,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,643 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:45,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:45,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,714 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:45,715 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:45,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,830 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:45,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:45,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:45,904 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:45,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:46,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,051 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:46,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:46,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,128 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:46,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:46,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:46,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,247 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:34:46,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:46,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,319 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:34:46,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:34:46,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:46,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:34:48,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:48,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:48,043 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:48,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:48,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:48,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:48,113 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:48,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:48,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:48,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:48,177 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:48,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:34:48,202 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:34:48,217 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:34:56,344 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8097#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|)) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (not (<= (+ (* |ULTIMATE.start_finddup_~j~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset| 4) (select |#length| |ULTIMATE.start_finddup_~a#1.base|))) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (= (select (select |#memory_int| |ULTIMATE.start_finddup_~a#1.base|) (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) |ULTIMATE.start_finddup_#t~mem10#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= 1 |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (= (select |#valid| |ULTIMATE.start_finddup_~a#1.base|) 1) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= 1 |ULTIMATE.start_finddup_~n#1|) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (<= 0 (+ (* |ULTIMATE.start_finddup_~i~1#1| 4) |ULTIMATE.start_finddup_~a#1.offset|)) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-23 14:34:56,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:34:56,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:34:56,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2022-11-23 14:34:56,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059411418] [2022-11-23 14:34:56,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:34:56,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 14:34:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:34:56,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 14:34:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1247, Unknown=0, NotChecked=0, Total=1406 [2022-11-23 14:34:56,345 INFO L87 Difference]: Start difference. First operand 123 states and 147 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:58,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:34:58,203 INFO L93 Difference]: Finished difference Result 450 states and 521 transitions. [2022-11-23 14:34:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 14:34:58,204 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-23 14:34:58,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:34:58,207 INFO L225 Difference]: With dead ends: 450 [2022-11-23 14:34:58,207 INFO L226 Difference]: Without dead ends: 450 [2022-11-23 14:34:58,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=643, Invalid=3647, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 14:34:58,209 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 1380 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 1305 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1384 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:34:58,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1384 Valid, 918 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1305 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:34:58,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-11-23 14:34:58,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 138. [2022-11-23 14:34:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 99 states have (on average 1.404040404040404) internal successors, (139), 119 states have internal predecessors, (139), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:34:58,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 168 transitions. [2022-11-23 14:34:58,220 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 168 transitions. Word has length 35 [2022-11-23 14:34:58,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:34:58,220 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 168 transitions. [2022-11-23 14:34:58,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-23 14:34:58,220 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 168 transitions. [2022-11-23 14:34:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-23 14:34:58,221 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:34:58,221 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:34:58,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:34:58,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-23 14:34:58,427 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:34:58,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:34:58,427 INFO L85 PathProgramCache]: Analyzing trace with hash -43186018, now seen corresponding path program 1 times [2022-11-23 14:34:58,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:34:58,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71117531] [2022-11-23 14:34:58,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:58,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:34:58,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:58,967 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:34:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71117531] [2022-11-23 14:34:58,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71117531] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:34:58,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706377707] [2022-11-23 14:34:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:34:58,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:34:58,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:34:58,969 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:34:58,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:34:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:34:59,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-23 14:34:59,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:34:59,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:34:59,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:34:59,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-11-23 14:34:59,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-11-23 14:34:59,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:59,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:34:59,606 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_418 (Array Int Int))) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_finddup_~_j#1.base| v_ArrVal_418) |c_ULTIMATE.start_main_~#i~2#1.base|) |c_ULTIMATE.start_main_~#i~2#1.offset|) 1) |c_ULTIMATE.start_main_~n~0#1|)) is different from false [2022-11-23 14:34:59,616 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:34:59,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 21 [2022-11-23 14:34:59,626 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:34:59,626 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 37 [2022-11-23 14:34:59,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2022-11-23 14:34:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-23 14:34:59,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706377707] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:34:59,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [296464942] [2022-11-23 14:34:59,826 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-23 14:34:59,826 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:34:59,826 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:34:59,827 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:34:59,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:34:59,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:59,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:59,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:59,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:34:59,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:59,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:34:59,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:59,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:34:59,969 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:34:59,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:00,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,036 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:00,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:00,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,148 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:00,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:00,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,226 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:00,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:00,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,360 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:00,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:00,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,450 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:00,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:00,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:00,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:35:00,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:00,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:35:00,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:00,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:35:00,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:00,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:00,930 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-23 14:35:00,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:35:01,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2022-11-23 14:35:01,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:35:01,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:01,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:01,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:01,444 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:01,444 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:35:01,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:01,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:01,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:01,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:01,821 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:01,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:35:02,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:02,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:02,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:02,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:02,534 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:02,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:35:03,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:03,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:03,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:03,219 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:03,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:35:03,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,331 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:03,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:03,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,394 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:03,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:03,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:03,464 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:03,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:03,488 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-23 14:35:03,500 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:35:03,514 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:35:25,028 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9012#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:35:25,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:35:25,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:35:25,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 13] total 30 [2022-11-23 14:35:25,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962680723] [2022-11-23 14:35:25,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:35:25,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 14:35:25,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:25,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 14:35:25,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=2384, Unknown=1, NotChecked=102, Total=2862 [2022-11-23 14:35:25,031 INFO L87 Difference]: Start difference. First operand 138 states and 168 transitions. Second operand has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:35:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:26,955 INFO L93 Difference]: Finished difference Result 184 states and 215 transitions. [2022-11-23 14:35:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:35:26,956 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2022-11-23 14:35:26,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:26,957 INFO L225 Difference]: With dead ends: 184 [2022-11-23 14:35:26,957 INFO L226 Difference]: Without dead ends: 184 [2022-11-23 14:35:26,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1763 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=849, Invalid=4556, Unknown=1, NotChecked=144, Total=5550 [2022-11-23 14:35:26,959 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 930 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 944 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 1243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 135 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:26,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 661 Invalid, 1243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 944 Invalid, 0 Unknown, 135 Unchecked, 0.8s Time] [2022-11-23 14:35:26,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-23 14:35:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 143. [2022-11-23 14:35:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 102 states have (on average 1.392156862745098) internal successors, (142), 123 states have internal predecessors, (142), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 14:35:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2022-11-23 14:35:26,970 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 37 [2022-11-23 14:35:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:26,970 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2022-11-23 14:35:26,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 28 states have internal predecessors, (49), 5 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-23 14:35:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2022-11-23 14:35:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:35:26,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:26,971 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:26,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:27,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 14:35:27,177 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:35:27,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash -986850864, now seen corresponding path program 3 times [2022-11-23 14:35:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:27,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742782496] [2022-11-23 14:35:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 14:35:35,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:35,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742782496] [2022-11-23 14:35:35,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742782496] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:35,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895035663] [2022-11-23 14:35:35,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:35:35,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:35,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:35,505 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:35,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:35:35,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:35:35,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:35:35,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-23 14:35:35,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:35,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-23 14:35:36,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-23 14:35:36,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 14:35:37,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 41 [2022-11-23 14:35:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:35:37,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:35:40,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895035663] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:40,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385442217] [2022-11-23 14:35:40,423 INFO L159 IcfgInterpreter]: Started Sifa with 22 locations of interest [2022-11-23 14:35:40,423 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:35:40,424 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:35:40,424 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:35:40,424 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:35:40,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:35:40,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:35:40,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,558 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:40,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:40,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,627 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:40,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:40,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,761 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:40,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:40,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,845 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:40,847 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:40,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:40,978 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:40,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:41,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,055 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:41,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:41,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:41,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:35:41,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:41,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:35:41,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:35:41,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:41,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:35:42,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:42,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:42,990 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:42,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:43,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:43,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:43,053 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:43,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:43,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:43,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:35:43,113 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:35:43,113 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:35:43,156 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 10 for LOIs [2022-11-23 14:35:43,160 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:35:43,175 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:35:52,522 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9649#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:35:52,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:35:52,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:35:52,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 30 [2022-11-23 14:35:52,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130739783] [2022-11-23 14:35:52,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:35:52,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-23 14:35:52,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-23 14:35:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=3100, Unknown=1, NotChecked=0, Total=3422 [2022-11-23 14:35:52,524 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:35:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:55,900 INFO L93 Difference]: Finished difference Result 125 states and 143 transitions. [2022-11-23 14:35:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-23 14:35:55,901 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 41 [2022-11-23 14:35:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:55,902 INFO L225 Difference]: With dead ends: 125 [2022-11-23 14:35:55,902 INFO L226 Difference]: Without dead ends: 125 [2022-11-23 14:35:55,903 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=409, Invalid=3750, Unknown=1, NotChecked=0, Total=4160 [2022-11-23 14:35:55,903 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 59 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:55,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 714 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 14:35:55,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-23 14:35:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 113. [2022-11-23 14:35:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 73 states have (on average 1.36986301369863) internal successors, (100), 94 states have internal predecessors, (100), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:35:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2022-11-23 14:35:55,908 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 41 [2022-11-23 14:35:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:55,909 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2022-11-23 14:35:55,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 30 states have internal predecessors, (47), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-23 14:35:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2022-11-23 14:35:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:35:55,910 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:55,910 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:55,921 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:35:56,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 14:35:56,116 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:35:56,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:56,117 INFO L85 PathProgramCache]: Analyzing trace with hash -2016286436, now seen corresponding path program 1 times [2022-11-23 14:35:56,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:56,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066858951] [2022-11-23 14:35:56,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:56,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:35:56,180 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:56,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066858951] [2022-11-23 14:35:56,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066858951] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:56,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:56,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:35:56,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757240656] [2022-11-23 14:35:56,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:56,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:35:56,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:56,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:35:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:56,182 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:35:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:56,258 INFO L93 Difference]: Finished difference Result 109 states and 125 transitions. [2022-11-23 14:35:56,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:56,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-23 14:35:56,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:56,260 INFO L225 Difference]: With dead ends: 109 [2022-11-23 14:35:56,260 INFO L226 Difference]: Without dead ends: 109 [2022-11-23 14:35:56,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:35:56,261 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 78 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:56,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:35:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-23 14:35:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-11-23 14:35:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 73 states have (on average 1.3150684931506849) internal successors, (96), 90 states have internal predecessors, (96), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:35:56,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2022-11-23 14:35:56,266 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 41 [2022-11-23 14:35:56,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:56,267 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2022-11-23 14:35:56,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:35:56,272 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2022-11-23 14:35:56,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:35:56,272 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:56,273 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:56,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-23 14:35:56,273 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:35:56,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:56,273 INFO L85 PathProgramCache]: Analyzing trace with hash -2016286435, now seen corresponding path program 1 times [2022-11-23 14:35:56,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:56,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811784243] [2022-11-23 14:35:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:56,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:56,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:56,407 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-23 14:35:56,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:56,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811784243] [2022-11-23 14:35:56,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811784243] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:56,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:56,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:35:56,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601160287] [2022-11-23 14:35:56,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:56,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:35:56,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:56,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:35:56,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:35:56,410 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:35:56,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:56,504 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2022-11-23 14:35:56,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:35:56,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-11-23 14:35:56,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:56,506 INFO L225 Difference]: With dead ends: 105 [2022-11-23 14:35:56,506 INFO L226 Difference]: Without dead ends: 105 [2022-11-23 14:35:56,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:35:56,507 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 70 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:56,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:35:56,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-23 14:35:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-23 14:35:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.2602739726027397) internal successors, (92), 86 states have internal predecessors, (92), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:35:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2022-11-23 14:35:56,510 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 41 [2022-11-23 14:35:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:56,510 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2022-11-23 14:35:56,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:35:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2022-11-23 14:35:56,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-23 14:35:56,513 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:56,513 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:56,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-23 14:35:56,514 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:35:56,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:56,514 INFO L85 PathProgramCache]: Analyzing trace with hash 12704851, now seen corresponding path program 1 times [2022-11-23 14:35:56,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:56,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349812585] [2022-11-23 14:35:56,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:56,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:35:56,715 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:56,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349812585] [2022-11-23 14:35:56,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349812585] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:56,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:56,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-23 14:35:56,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431987738] [2022-11-23 14:35:56,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:56,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:35:56,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:56,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:35:56,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-23 14:35:56,717 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:35:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:56,884 INFO L93 Difference]: Finished difference Result 107 states and 120 transitions. [2022-11-23 14:35:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:35:56,884 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 45 [2022-11-23 14:35:56,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:56,885 INFO L225 Difference]: With dead ends: 107 [2022-11-23 14:35:56,885 INFO L226 Difference]: Without dead ends: 107 [2022-11-23 14:35:56,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:35:56,886 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 86 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:56,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 228 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:35:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-23 14:35:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2022-11-23 14:35:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 86 states have internal predecessors, (91), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:35:56,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2022-11-23 14:35:56,891 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 45 [2022-11-23 14:35:56,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:56,892 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2022-11-23 14:35:56,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 7 states have internal predecessors, (26), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:35:56,892 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2022-11-23 14:35:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:35:56,893 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:56,893 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:56,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-23 14:35:56,893 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:35:56,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:56,894 INFO L85 PathProgramCache]: Analyzing trace with hash 231963315, now seen corresponding path program 1 times [2022-11-23 14:35:56,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:56,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572441653] [2022-11-23 14:35:56,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:56,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-23 14:35:57,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:57,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572441653] [2022-11-23 14:35:57,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572441653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:57,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:35:57,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:35:57,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072090301] [2022-11-23 14:35:57,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:57,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:35:57,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:57,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:35:57,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-23 14:35:57,142 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:35:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:35:57,362 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2022-11-23 14:35:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:35:57,362 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 46 [2022-11-23 14:35:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:35:57,367 INFO L225 Difference]: With dead ends: 111 [2022-11-23 14:35:57,367 INFO L226 Difference]: Without dead ends: 111 [2022-11-23 14:35:57,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:35:57,368 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 104 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:35:57,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 211 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:35:57,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-11-23 14:35:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-11-23 14:35:57,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 76 states have (on average 1.236842105263158) internal successors, (94), 90 states have internal predecessors, (94), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 14:35:57,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 125 transitions. [2022-11-23 14:35:57,376 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 125 transitions. Word has length 46 [2022-11-23 14:35:57,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:35:57,377 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 125 transitions. [2022-11-23 14:35:57,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:35:57,377 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 125 transitions. [2022-11-23 14:35:57,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:35:57,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:35:57,379 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:35:57,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-23 14:35:57,380 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:35:57,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:35:57,380 INFO L85 PathProgramCache]: Analyzing trace with hash 778226521, now seen corresponding path program 1 times [2022-11-23 14:35:57,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:35:57,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588346923] [2022-11-23 14:35:57,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:57,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:35:57,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:57,729 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:35:57,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:35:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588346923] [2022-11-23 14:35:57,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588346923] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:35:57,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478464377] [2022-11-23 14:35:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:35:57,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:35:57,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:35:57,731 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:35:57,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:35:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:35:57,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 14:35:57,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:35:57,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:35:58,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:35:58,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-23 14:35:58,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:35:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:35:58,222 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:35:58,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478464377] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:35:58,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:35:58,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 16 [2022-11-23 14:35:58,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342687798] [2022-11-23 14:35:58,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:35:58,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:35:58,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:35:58,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:35:58,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-23 14:35:58,226 INFO L87 Difference]: Start difference. First operand 110 states and 125 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:35:59,268 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:36:01,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:36:03,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:36:05,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:36:07,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:36:07,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:07,538 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2022-11-23 14:36:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:36:07,538 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 46 [2022-11-23 14:36:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:07,539 INFO L225 Difference]: With dead ends: 129 [2022-11-23 14:36:07,539 INFO L226 Difference]: Without dead ends: 129 [2022-11-23 14:36:07,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:36:07,540 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 102 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 24 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:07,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 288 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 189 Invalid, 5 Unknown, 0 Unchecked, 9.3s Time] [2022-11-23 14:36:07,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-11-23 14:36:07,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 125. [2022-11-23 14:36:07,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 101 states have internal predecessors, (106), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:36:07,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2022-11-23 14:36:07,544 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 46 [2022-11-23 14:36:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:07,545 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2022-11-23 14:36:07,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 8 states have internal predecessors, (28), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-23 14:36:07,545 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2022-11-23 14:36:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:36:07,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:07,545 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:07,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:36:07,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 14:36:07,746 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:36:07,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:07,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1326522291, now seen corresponding path program 1 times [2022-11-23 14:36:07,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:07,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595509348] [2022-11-23 14:36:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:07,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:07,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:07,811 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:36:07,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:07,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595509348] [2022-11-23 14:36:07,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595509348] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:07,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:07,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:07,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819549358] [2022-11-23 14:36:07,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:07,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:36:07,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:07,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:36:07,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:07,814 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:36:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:07,888 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-11-23 14:36:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2022-11-23 14:36:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:07,890 INFO L225 Difference]: With dead ends: 121 [2022-11-23 14:36:07,890 INFO L226 Difference]: Without dead ends: 121 [2022-11-23 14:36:07,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:36:07,891 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 56 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:07,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 76 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:36:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-23 14:36:07,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-11-23 14:36:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 88 states have (on average 1.1590909090909092) internal successors, (102), 97 states have internal predecessors, (102), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:36:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2022-11-23 14:36:07,897 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 50 [2022-11-23 14:36:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:07,898 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2022-11-23 14:36:07,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:36:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2022-11-23 14:36:07,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-23 14:36:07,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:07,899 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:07,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-11-23 14:36:07,899 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:36:07,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:07,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1326522290, now seen corresponding path program 1 times [2022-11-23 14:36:07,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:07,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156646599] [2022-11-23 14:36:07,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:07,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:07,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-11-23 14:36:08,029 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:08,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156646599] [2022-11-23 14:36:08,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156646599] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:36:08,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:36:08,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:36:08,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903396365] [2022-11-23 14:36:08,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:36:08,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:36:08,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:36:08,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:08,031 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:36:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:08,096 INFO L93 Difference]: Finished difference Result 117 states and 127 transitions. [2022-11-23 14:36:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:36:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 50 [2022-11-23 14:36:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:08,098 INFO L225 Difference]: With dead ends: 117 [2022-11-23 14:36:08,098 INFO L226 Difference]: Without dead ends: 117 [2022-11-23 14:36:08,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:36:08,098 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:08,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 69 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:36:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-23 14:36:08,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-23 14:36:08,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 93 states have internal predecessors, (98), 15 states have call successors, (15), 10 states have call predecessors, (15), 10 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-23 14:36:08,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2022-11-23 14:36:08,102 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 50 [2022-11-23 14:36:08,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:08,102 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2022-11-23 14:36:08,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-23 14:36:08,103 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2022-11-23 14:36:08,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 14:36:08,105 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:08,105 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:08,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-23 14:36:08,106 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:36:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1761697376, now seen corresponding path program 1 times [2022-11-23 14:36:08,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:08,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630384394] [2022-11-23 14:36:08,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:08,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:08,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:08,633 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:36:08,634 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:08,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630384394] [2022-11-23 14:36:08,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630384394] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:36:08,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104451780] [2022-11-23 14:36:08,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:08,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:08,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:36:08,636 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:36:08,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 14:36:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:08,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 14:36:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:08,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:36:09,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:36:09,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2022-11-23 14:36:09,586 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 14:36:09,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2022-11-23 14:36:09,658 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:36:09,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:09,881 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:36:09,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2022-11-23 14:36:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:36:10,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104451780] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:10,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1276596236] [2022-11-23 14:36:10,836 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-23 14:36:10,836 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:36:10,837 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:36:10,837 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:36:10,837 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:36:10,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:10,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:10,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:10,905 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:36:10,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:10,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:36:10,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:10,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:10,977 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:10,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:11,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,039 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:11,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:11,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,172 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:11,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:11,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,242 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:11,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:11,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,372 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:11,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:11,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,457 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:11,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:11,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:11,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:36:11,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:11,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,728 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:36:11,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:11,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:11,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:36:11,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:11,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-23 14:36:12,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:36:12,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 72 [2022-11-23 14:36:12,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:36:12,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:12,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:12,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:12,424 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:12,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:12,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:12,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:12,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:12,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:12,694 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:12,694 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:13,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:13,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:13,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:13,408 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:13,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:13,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:13,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:13,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:13,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:14,009 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:14,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:15,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:15,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:15,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:15,691 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:15,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:15,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:15,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:15,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:15,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:16,029 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:16,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:17,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:17,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:17,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:17,515 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:17,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:17,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:17,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:17,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:17,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:17,874 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:17,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:18,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:18,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:18,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:18,541 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:18,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:18,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:18,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:18,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:18,762 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:18,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:36:18,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,857 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:18,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:18,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,917 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:18,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:18,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:18,989 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:18,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:19,013 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:36:19,022 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:36:19,035 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:36:54,069 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12065#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:36:54,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:36:54,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:36:54,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13] total 32 [2022-11-23 14:36:54,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278498665] [2022-11-23 14:36:54,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:36:54,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 14:36:54,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:36:54,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 14:36:54,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=2961, Unknown=0, NotChecked=0, Total=3422 [2022-11-23 14:36:54,072 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 14:36:56,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:36:56,159 INFO L93 Difference]: Finished difference Result 202 states and 212 transitions. [2022-11-23 14:36:56,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-23 14:36:56,159 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 54 [2022-11-23 14:36:56,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:36:56,161 INFO L225 Difference]: With dead ends: 202 [2022-11-23 14:36:56,161 INFO L226 Difference]: Without dead ends: 200 [2022-11-23 14:36:56,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=859, Invalid=5303, Unknown=0, NotChecked=0, Total=6162 [2022-11-23 14:36:56,163 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 699 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:36:56,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [703 Valid, 430 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:36:56,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-23 14:36:56,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2022-11-23 14:36:56,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 142 states have (on average 1.091549295774648) internal successors, (155), 148 states have internal predecessors, (155), 24 states have call successors, (24), 17 states have call predecessors, (24), 16 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-11-23 14:36:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 201 transitions. [2022-11-23 14:36:56,171 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 201 transitions. Word has length 54 [2022-11-23 14:36:56,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:36:56,172 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 201 transitions. [2022-11-23 14:36:56,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 2.6296296296296298) internal successors, (71), 31 states have internal predecessors, (71), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 14:36:56,173 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 201 transitions. [2022-11-23 14:36:56,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 14:36:56,175 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:36:56,175 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:36:56,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:36:56,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:56,381 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:36:56,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:36:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash 160485480, now seen corresponding path program 1 times [2022-11-23 14:36:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:36:56,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113395473] [2022-11-23 14:36:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:56,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:36:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:36:56,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:36:56,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113395473] [2022-11-23 14:36:56,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113395473] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:36:56,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9485934] [2022-11-23 14:36:56,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:36:56,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:36:56,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:36:56,595 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:36:56,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 14:36:56,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:36:56,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 14:36:56,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:36:56,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:36:57,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:36:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:36:57,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:36:57,089 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 28 [2022-11-23 14:36:57,268 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-23 14:36:57,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9485934] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:36:57,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1310692900] [2022-11-23 14:36:57,270 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2022-11-23 14:36:57,270 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:36:57,271 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:36:57,271 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:36:57,271 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:36:57,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:36:57,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:36:57,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,393 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:57,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:57,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,457 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:57,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:57,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,581 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:57,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:57,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,655 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:57,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:57,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,789 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:57,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:57,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,867 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:36:57,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:36:57,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:57,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:57,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:36:58,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:36:58,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:36:58,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:36:58,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:37:00,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:00,289 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-23 14:37:00,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-23 14:37:00,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:00,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:00,429 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 14:37:00,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-23 14:37:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:02,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:02,774 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:02,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:02,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:02,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:02,842 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:02,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:02,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:02,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:02,915 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:02,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:02,948 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-11-23 14:37:02,959 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:37:02,973 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:37:19,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12861#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:37:19,430 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:37:19,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:37:19,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 16 [2022-11-23 14:37:19,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580448938] [2022-11-23 14:37:19,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:37:19,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 14:37:19,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:37:19,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 14:37:19,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1951, Unknown=1, NotChecked=0, Total=2162 [2022-11-23 14:37:19,432 INFO L87 Difference]: Start difference. First operand 186 states and 201 transitions. Second operand has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 14:37:20,836 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:37:22,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:37:24,858 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:37:26,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:37:28,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:37:31,064 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:37:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:37:31,315 INFO L93 Difference]: Finished difference Result 189 states and 199 transitions. [2022-11-23 14:37:31,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 14:37:31,315 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 55 [2022-11-23 14:37:31,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:37:31,317 INFO L225 Difference]: With dead ends: 189 [2022-11-23 14:37:31,317 INFO L226 Difference]: Without dead ends: 189 [2022-11-23 14:37:31,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 122 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=299, Invalid=2670, Unknown=1, NotChecked=0, Total=2970 [2022-11-23 14:37:31,318 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 194 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 41 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:37:31,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 443 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 319 Invalid, 6 Unknown, 0 Unchecked, 11.7s Time] [2022-11-23 14:37:31,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-11-23 14:37:31,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 185. [2022-11-23 14:37:31,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 142 states have (on average 1.0845070422535212) internal successors, (154), 147 states have internal predecessors, (154), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-23 14:37:31,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 198 transitions. [2022-11-23 14:37:31,324 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 198 transitions. Word has length 55 [2022-11-23 14:37:31,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:37:31,324 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 198 transitions. [2022-11-23 14:37:31,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.6875) internal successors, (75), 16 states have internal predecessors, (75), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-23 14:37:31,325 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 198 transitions. [2022-11-23 14:37:31,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 14:37:31,326 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:37:31,326 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:37:31,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:37:31,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:37:31,527 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:37:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:37:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash -721790580, now seen corresponding path program 1 times [2022-11-23 14:37:31,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:37:31,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382535391] [2022-11-23 14:37:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:37:31,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:37:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:37:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:37:32,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:37:32,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382535391] [2022-11-23 14:37:32,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382535391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:37:32,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977312580] [2022-11-23 14:37:32,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:37:32,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:37:32,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:37:32,260 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:37:32,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 14:37:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:37:32,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-23 14:37:32,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:37:32,460 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:37:32,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:37:32,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-11-23 14:37:33,831 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 14:37:33,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2022-11-23 14:37:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 14:37:33,871 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:37:33,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977312580] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:37:33,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:37:33,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [14] total 26 [2022-11-23 14:37:33,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096258045] [2022-11-23 14:37:33,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:37:33,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 14:37:33,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:37:33,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 14:37:33,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-11-23 14:37:33,873 INFO L87 Difference]: Start difference. First operand 185 states and 198 transitions. Second operand has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 14:37:35,994 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2022-11-23 14:37:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:37:36,646 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2022-11-23 14:37:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 14:37:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2022-11-23 14:37:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:37:36,648 INFO L225 Difference]: With dead ends: 184 [2022-11-23 14:37:36,648 INFO L226 Difference]: Without dead ends: 184 [2022-11-23 14:37:36,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 14:37:36,649 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 178 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 43 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:37:36,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 121 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 128 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 14:37:36,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-23 14:37:36,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-23 14:37:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.0633802816901408) internal successors, (151), 146 states have internal predecessors, (151), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-23 14:37:36,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 195 transitions. [2022-11-23 14:37:36,654 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 195 transitions. Word has length 58 [2022-11-23 14:37:36,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:37:36,654 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 195 transitions. [2022-11-23 14:37:36,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 14 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2022-11-23 14:37:36,654 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 195 transitions. [2022-11-23 14:37:36,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-23 14:37:36,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:37:36,656 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:37:36,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 14:37:36,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-23 14:37:36,857 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:37:36,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:37:36,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2143956239, now seen corresponding path program 1 times [2022-11-23 14:37:36,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:37:36,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706698260] [2022-11-23 14:37:36,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:37:36,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:37:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:37:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:37:37,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:37:37,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706698260] [2022-11-23 14:37:37,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706698260] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:37:37,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:37:37,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-23 14:37:37,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195523857] [2022-11-23 14:37:37,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:37:37,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:37:37,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:37:37,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:37:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-11-23 14:37:37,365 INFO L87 Difference]: Start difference. First operand 184 states and 195 transitions. Second operand has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 14:37:37,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:37:37,928 INFO L93 Difference]: Finished difference Result 184 states and 193 transitions. [2022-11-23 14:37:37,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 14:37:37,929 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 60 [2022-11-23 14:37:37,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:37:37,930 INFO L225 Difference]: With dead ends: 184 [2022-11-23 14:37:37,930 INFO L226 Difference]: Without dead ends: 184 [2022-11-23 14:37:37,930 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:37:37,931 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 121 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:37:37,931 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 174 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:37:37,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-11-23 14:37:37,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-11-23 14:37:37,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 142 states have (on average 1.0492957746478873) internal successors, (149), 146 states have internal predecessors, (149), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-23 14:37:37,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 193 transitions. [2022-11-23 14:37:37,942 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 193 transitions. Word has length 60 [2022-11-23 14:37:37,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:37:37,942 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 193 transitions. [2022-11-23 14:37:37,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 14:37:37,943 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 193 transitions. [2022-11-23 14:37:37,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-23 14:37:37,944 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:37:37,944 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:37:37,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-11-23 14:37:37,944 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:37:37,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:37:37,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1395584350, now seen corresponding path program 1 times [2022-11-23 14:37:37,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:37:37,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606830213] [2022-11-23 14:37:37,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:37:37,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:37:37,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:37:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:37:38,615 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:37:38,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606830213] [2022-11-23 14:37:38,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606830213] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:37:38,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9269163] [2022-11-23 14:37:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:37:38,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:37:38,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:37:38,617 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:37:38,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 14:37:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:37:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 14:37:38,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:37:38,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:37:39,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:37:39,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2022-11-23 14:37:39,850 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 14:37:39,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 19 [2022-11-23 14:37:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:37:39,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:37:40,150 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:37:40,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 706 treesize of output 654 [2022-11-23 14:37:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-23 14:37:41,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9269163] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:37:41,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1220168456] [2022-11-23 14:37:41,331 INFO L159 IcfgInterpreter]: Started Sifa with 39 locations of interest [2022-11-23 14:37:41,331 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:37:41,331 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:37:41,332 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:37:41,332 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:37:41,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,400 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:37:41,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:37:41,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,468 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:41,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:41,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,532 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:41,533 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:41,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,641 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:41,642 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:41,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,711 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:41,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:41,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,871 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:41,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:41,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:41,948 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:41,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:42,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:42,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:37:42,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:37:42,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:42,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:37:42,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:42,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:43,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:43,015 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-23 14:37:43,015 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 37 [2022-11-23 14:37:43,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:43,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:43,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:43,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:37:43,117 INFO L321 Elim1Store]: treesize reduction 28, result has 55.6 percent of original size [2022-11-23 14:37:43,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 42 treesize of output 63 [2022-11-23 14:37:45,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:45,353 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:45,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:45,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:45,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:45,421 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:45,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:45,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:45,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:37:45,484 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:37:45,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:37:45,508 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:37:45,515 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:37:45,529 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:38:08,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14653#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:38:08,297 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:38:08,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:38:08,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17, 15] total 38 [2022-11-23 14:38:08,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517431037] [2022-11-23 14:38:08,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:38:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-23 14:38:08,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:38:08,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-23 14:38:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=4909, Unknown=0, NotChecked=0, Total=5256 [2022-11-23 14:38:08,299 INFO L87 Difference]: Start difference. First operand 184 states and 193 transitions. Second operand has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 14:38:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:38:11,892 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2022-11-23 14:38:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-23 14:38:11,892 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) Word has length 62 [2022-11-23 14:38:11,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:38:11,894 INFO L225 Difference]: With dead ends: 243 [2022-11-23 14:38:11,894 INFO L226 Difference]: Without dead ends: 239 [2022-11-23 14:38:11,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 123 SyntacticMatches, 7 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3622 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=928, Invalid=9172, Unknown=0, NotChecked=0, Total=10100 [2022-11-23 14:38:11,896 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 726 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 1352 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 694 SdHoareTripleChecker+Invalid, 1588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:38:11,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 694 Invalid, 1588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1352 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:38:11,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-11-23 14:38:11,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 121. [2022-11-23 14:38:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 93 states have (on average 1.053763440860215) internal successors, (98), 95 states have internal predecessors, (98), 14 states have call successors, (14), 12 states have call predecessors, (14), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 14:38:11,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-11-23 14:38:11,901 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 62 [2022-11-23 14:38:11,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:38:11,902 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-11-23 14:38:11,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 2.878787878787879) internal successors, (95), 37 states have internal predecessors, (95), 8 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 3 states have call predecessors, (11), 6 states have call successors, (11) [2022-11-23 14:38:11,902 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-11-23 14:38:11,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 14:38:11,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:38:11,903 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:38:11,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:38:12,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-23 14:38:12,112 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:38:12,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:38:12,112 INFO L85 PathProgramCache]: Analyzing trace with hash 99582740, now seen corresponding path program 1 times [2022-11-23 14:38:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:38:12,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883783989] [2022-11-23 14:38:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:38:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:38:13,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:38:13,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883783989] [2022-11-23 14:38:13,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883783989] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:38:13,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730383625] [2022-11-23 14:38:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:38:13,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:38:13,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:38:13,562 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:38:13,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 14:38:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:38:13,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 114 conjunts are in the unsatisfiable core [2022-11-23 14:38:13,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:38:13,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2022-11-23 14:38:14,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-23 14:38:14,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2022-11-23 14:38:14,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:38:15,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:15,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-11-23 14:38:15,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:38:15,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:15,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:15,569 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2022-11-23 14:38:15,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:38:19,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:19,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:19,139 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-23 14:38:19,139 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 47 [2022-11-23 14:38:19,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-23 14:38:19,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-11-23 14:38:19,326 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-11-23 14:38:19,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:38:20,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:20,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2022-11-23 14:38:25,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730383625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:38:25,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2119755962] [2022-11-23 14:38:25,392 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-11-23 14:38:25,393 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:38:25,393 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:38:25,393 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:38:25,393 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:38:25,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:38:25,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:38:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,528 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:25,528 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:38:25,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,588 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:25,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:38:25,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,697 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:25,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:38:25,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,774 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:25,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:38:25,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,898 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:25,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:38:25,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:25,973 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:25,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:38:26,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:26,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:38:26,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:26,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,172 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:38:26,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:26,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:38:26,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:26,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,474 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 62 [2022-11-23 14:38:26,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:38:26,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,629 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 57 [2022-11-23 14:38:26,654 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2022-11-23 14:38:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:26,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:26,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:26,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:26,879 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:26,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:27,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:27,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:27,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:27,116 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:27,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:27,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:27,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:27,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:27,698 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:27,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:27,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:27,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:27,939 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:27,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:27,974 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:27,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:29,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:29,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:29,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:29,345 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:29,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:29,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:29,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:29,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:29,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:29,900 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:29,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:31,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:31,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:31,399 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:31,399 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:31,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:31,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:31,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:31,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:31,709 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:31,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:32,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:32,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:32,343 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:32,380 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:32,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:32,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:32,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:32,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:32,580 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:32,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:32,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:32,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:32,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:32,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:32,809 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:32,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:33,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:33,217 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:33,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:33,253 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:33,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:33,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:33,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:33,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:38:33,595 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:33,595 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 20 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 46 [2022-11-23 14:38:33,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,677 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:33,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:38:33,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,741 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:33,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:38:33,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:38:33,807 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:38:33,807 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:38:33,831 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 163 for LOIs [2022-11-23 14:38:34,079 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:38:34,093 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:39:31,274 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15507#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:39:31,274 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:39:31,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 14:39:31,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 42 [2022-11-23 14:39:31,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979509321] [2022-11-23 14:39:31,274 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 14:39:31,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 14:39:31,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:39:31,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 14:39:31,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=6518, Unknown=2, NotChecked=0, Total=7482 [2022-11-23 14:39:31,276 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-23 14:39:41,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:39:41,802 INFO L93 Difference]: Finished difference Result 162 states and 164 transitions. [2022-11-23 14:39:41,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 14:39:41,803 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 64 [2022-11-23 14:39:41,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:39:41,803 INFO L225 Difference]: With dead ends: 162 [2022-11-23 14:39:41,803 INFO L226 Difference]: Without dead ends: 80 [2022-11-23 14:39:41,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 89 SyntacticMatches, 26 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5455 ImplicationChecksByTransitivity, 74.5s TimeCoverageRelationStatistics Valid=1767, Invalid=11113, Unknown=2, NotChecked=0, Total=12882 [2022-11-23 14:39:41,805 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 370 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:39:41,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 347 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-11-23 14:39:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-23 14:39:41,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-23 14:39:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:39:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-11-23 14:39:41,809 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 64 [2022-11-23 14:39:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:39:41,809 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-11-23 14:39:41,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 2.027027027027027) internal successors, (75), 40 states have internal predecessors, (75), 8 states have call successors, (17), 5 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-11-23 14:39:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-11-23 14:39:41,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-23 14:39:41,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:39:41,810 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:39:41,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 14:39:42,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-23 14:39:42,019 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:39:42,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:39:42,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1985221542, now seen corresponding path program 1 times [2022-11-23 14:39:42,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:39:42,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029677629] [2022-11-23 14:39:42,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:42,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:39:42,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:39:42,805 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:39:42,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029677629] [2022-11-23 14:39:42,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029677629] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:39:42,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866881345] [2022-11-23 14:39:42,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:39:42,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:39:42,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:39:42,807 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:39:42,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 14:39:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:39:42,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 14:39:42,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:39:43,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-23 14:39:44,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2022-11-23 14:39:44,266 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:39:44,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:39:44,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2022-11-23 14:39:44,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:44,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:44,660 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:39:44,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2022-11-23 14:39:44,960 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-23 14:39:44,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866881345] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:39:44,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105032827] [2022-11-23 14:39:44,962 INFO L159 IcfgInterpreter]: Started Sifa with 43 locations of interest [2022-11-23 14:39:44,962 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:39:44,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:39:44,962 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:39:44,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:39:45,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:39:45,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:39:45,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,087 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:39:45,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:39:45,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,147 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:39:45,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:39:45,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,261 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:39:45,262 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:39:45,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,336 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:39:45,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:39:45,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,485 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:39:45,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:39:45,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,574 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:39:45,575 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:39:45,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:39:45,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:39:45,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:39:45,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:39:45,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:45,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:39:47,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:47,898 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-23 14:39:47,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-23 14:39:47,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:39:47,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:48,036 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 14:39:48,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-23 14:39:52,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:52,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:52,162 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:39:52,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:39:52,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:52,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:52,230 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:39:52,230 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:39:52,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:52,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:39:52,298 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:39:52,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:39:52,322 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:39:52,327 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:39:52,342 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:40:21,223 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16280#(and (<= |ULTIMATE.start_mkdup_~a#1.offset| 0) (<= |ULTIMATE.start_main_~n~0#1| 2147483647) (<= 0 |ULTIMATE.start_finddup_~_i#1.offset|) (<= (+ |ULTIMATE.start_main_~#i~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#i~2#1.base|)) (<= 0 |ULTIMATE.start_main_~#i~2#1.base|) (= (select |#valid| |ULTIMATE.start_main_~#j~2#1.base|) 1) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (not (<= (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_#t~mem24#1| 4) 4) (select |#length| |ULTIMATE.start_main_~a~0#1.base|))) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 8589934588) (<= |ULTIMATE.start_finddup_#in~_i#1.offset| 0) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.offset|) (<= |ULTIMATE.start_mkdup_~j~0#1| 2147483647) (<= 0 |ULTIMATE.start_mkdup_~a#1.offset|) (<= |ULTIMATE.start_mkdup_~i~0#1| 2147483647) (<= |ULTIMATE.start_finddup_~a#1.offset| 0) (<= |ULTIMATE.start_mkdup_~n#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_#t~mem23#1| 4))) |ULTIMATE.start_main_#t~mem25#1|) (<= |ULTIMATE.start_mkdup_#in~a#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~x~0#1| 2147483648)) (= |ULTIMATE.start_finddup_#res#1| 1) (<= |ULTIMATE.start_finddup_~_i#1.offset| 0) (<= 1 |ULTIMATE.start_finddup_#in~n#1|) (= |ULTIMATE.start_main_#t~mem24#1| (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) |ULTIMATE.start_main_~#j~2#1.offset|)) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 2147483647) (= |ULTIMATE.start_main_#t~mem23#1| (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) |ULTIMATE.start_main_~#i~2#1.offset|)) (= (select |#valid| |ULTIMATE.start_main_~#i~2#1.base|) 1) (<= 0 |ULTIMATE.start_finddup_~a#1.offset|) (<= |ULTIMATE.start_main_~r~0#1| 1) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= 1 |ULTIMATE.start_finddup_~j~1#1|) (<= 0 |ULTIMATE.start_finddup_~i~1#1|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.offset|) (<= 0 (+ |ULTIMATE.start_mkdup_~j~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~_i#1.base|) (<= |ULTIMATE.start_mkdup_#in~n#1| 2147483647) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_mkdup_~x~0#1| 2147483647) (<= (+ |ULTIMATE.start_main_~#j~2#1.offset| 4) (select |#length| |ULTIMATE.start_main_~#j~2#1.base|)) (<= 1 |ULTIMATE.start_mkdup_~n#1|) (<= 0 |ULTIMATE.start_finddup_~_i#1.base|) (= |ULTIMATE.start_main_#t~malloc13#1.offset| 0) (<= |ULTIMATE.start_finddup_~n#1| 2147483647) (<= |ULTIMATE.start_finddup_#in~n#1| 2147483647) (<= 0 (select (select |#memory_int| |ULTIMATE.start_main_~#i~2#1.base|) |ULTIMATE.start_main_~#i~2#1.offset|)) (<= 1 |ULTIMATE.start_main_~r~0#1|) (< (select (select |#memory_int| |ULTIMATE.start_main_~#j~2#1.base|) |ULTIMATE.start_main_~#j~2#1.offset|) |ULTIMATE.start_main_~n~0#1|) (<= |ULTIMATE.start_finddup_#in~a#1.offset| 0) (= |ULTIMATE.start_main_~#j~2#1.offset| 0) (<= 0 |ULTIMATE.start_finddup_~_j#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_mkdup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_~_j#1.base|) (<= 0 |ULTIMATE.start_main_~#j~2#1.base|) (<= |ULTIMATE.start_finddup_~_j#1.offset| 0) (<= 0 (+ |ULTIMATE.start_mkdup_~i~0#1| 2147483648)) (<= 0 |ULTIMATE.start_finddup_#in~a#1.offset|) (<= 0 |ULTIMATE.start_finddup_#in~_j#1.base|) (<= (+ |ULTIMATE.start_main_~a~0#1.offset| 4 (* |ULTIMATE.start_main_#t~mem23#1| 4)) (select |#length| |ULTIMATE.start_main_~a~0#1.base|)) (<= 1 |ULTIMATE.start_finddup_~n#1|) (= (select |#valid| |ULTIMATE.start_main_~a~0#1.base|) 1) (<= 1 |ULTIMATE.start_mkdup_#in~n#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= |ULTIMATE.start_finddup_#in~_j#1.offset| 0) (= |#NULL.base| 0) (= |ULTIMATE.start_main_~#i~2#1.offset| 0))' at error location [2022-11-23 14:40:21,224 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:40:21,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:40:21,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2022-11-23 14:40:21,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139103195] [2022-11-23 14:40:21,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:40:21,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-23 14:40:21,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:40:21,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-23 14:40:21,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=4503, Unknown=0, NotChecked=0, Total=4970 [2022-11-23 14:40:21,226 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-23 14:40:22,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:40:22,736 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2022-11-23 14:40:22,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 14:40:22,737 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 70 [2022-11-23 14:40:22,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:40:22,737 INFO L225 Difference]: With dead ends: 81 [2022-11-23 14:40:22,737 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 14:40:22,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 139 SyntacticMatches, 11 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2247 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=652, Invalid=5990, Unknown=0, NotChecked=0, Total=6642 [2022-11-23 14:40:22,739 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 307 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:40:22,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 264 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:40:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 14:40:22,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-11-23 14:40:22,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:40:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-11-23 14:40:22,742 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 70 [2022-11-23 14:40:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:40:22,743 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-11-23 14:40:22,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.966666666666667) internal successors, (119), 31 states have internal predecessors, (119), 7 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-11-23 14:40:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-11-23 14:40:22,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:40:22,744 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:40:22,744 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:40:22,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:40:22,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:22,950 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:40:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:40:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1090870049, now seen corresponding path program 1 times [2022-11-23 14:40:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:40:22,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678079596] [2022-11-23 14:40:22,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:22,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:40:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-23 14:40:37,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:40:37,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678079596] [2022-11-23 14:40:37,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678079596] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:40:37,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482430094] [2022-11-23 14:40:37,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:40:37,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:40:37,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:40:37,801 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:40:37,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 14:40:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:40:37,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-23 14:40:37,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:40:38,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-23 14:40:38,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:40:39,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:39,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:39,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2022-11-23 14:40:40,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:40,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:40,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 39 [2022-11-23 14:40:43,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:43,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:40:43,118 INFO L321 Elim1Store]: treesize reduction 38, result has 22.4 percent of original size [2022-11-23 14:40:43,119 INFO L350 Elim1Store]: Elim1 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 6 case distinctions, treesize of input 52 treesize of output 36 [2022-11-23 14:40:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:40:43,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:40:46,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:46,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:40:46,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:40:46,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 6236 treesize of output 5752 [2022-11-23 14:40:46,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:40:46,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9264 treesize of output 7880 [2022-11-23 14:40:46,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-11-23 14:40:47,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 5334 treesize of output 4822 [2022-11-23 14:40:55,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 4881 treesize of output 4353 [2022-11-23 14:43:42,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:43:42,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 307 treesize of output 251 [2022-11-23 14:43:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 7 proven. 20 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-23 14:43:43,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482430094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:43:43,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [398562961] [2022-11-23 14:43:43,131 INFO L159 IcfgInterpreter]: Started Sifa with 45 locations of interest [2022-11-23 14:43:43,131 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:43:43,132 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:43:43,132 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:43:43,132 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:43:43,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 22 [2022-11-23 14:43:43,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:43:43,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,274 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:43,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:43:43,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,336 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:43,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:43:43,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,447 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:43,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:43:43,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,524 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:43,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:43:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,663 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:43,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:43:43,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,752 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:43,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:43:43,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:43,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2022-11-23 14:43:43,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 39 [2022-11-23 14:43:43,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:43,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:43,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 18 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 63 [2022-11-23 14:43:45,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,659 INFO L321 Elim1Store]: treesize reduction 37, result has 38.3 percent of original size [2022-11-23 14:43:45,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 45 [2022-11-23 14:43:45,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:43:45,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:45,801 INFO L321 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2022-11-23 14:43:45,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 50 treesize of output 87 [2022-11-23 14:43:50,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:50,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:50,119 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:50,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:43:50,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:50,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:50,182 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:50,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:43:50,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:50,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:43:50,249 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-23 14:43:50,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 45 [2022-11-23 14:43:50,276 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 18 for LOIs [2022-11-23 14:43:50,286 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 59 for LOIs [2022-11-23 14:43:50,299 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:44:28,422 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17000#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:44:28,423 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:44:28,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:44:28,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 21] total 60 [2022-11-23 14:44:28,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91262421] [2022-11-23 14:44:28,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:44:28,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-11-23 14:44:28,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:44:28,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-11-23 14:44:28,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=9512, Unknown=0, NotChecked=0, Total=10100 [2022-11-23 14:44:28,426 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 60 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 59 states have internal predecessors, (122), 11 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (22), 7 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-23 14:44:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:44:57,632 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2022-11-23 14:44:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-23 14:44:57,633 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 59 states have internal predecessors, (122), 11 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (22), 7 states have call predecessors, (22), 10 states have call successors, (22) Word has length 74 [2022-11-23 14:44:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:44:57,634 INFO L225 Difference]: With dead ends: 80 [2022-11-23 14:44:57,634 INFO L226 Difference]: Without dead ends: 80 [2022-11-23 14:44:57,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 147 SyntacticMatches, 8 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4648 ImplicationChecksByTransitivity, 74.3s TimeCoverageRelationStatistics Valid=1130, Invalid=14872, Unknown=0, NotChecked=0, Total=16002 [2022-11-23 14:44:57,636 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 480 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 1390 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:44:57,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 300 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1390 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-11-23 14:44:57,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-23 14:44:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2022-11-23 14:44:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-23 14:44:57,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-11-23 14:44:57,640 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2022-11-23 14:44:57,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:44:57,640 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-11-23 14:44:57,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 56 states have (on average 2.1785714285714284) internal successors, (122), 59 states have internal predecessors, (122), 11 states have call successors, (24), 4 states have call predecessors, (24), 5 states have return successors, (22), 7 states have call predecessors, (22), 10 states have call successors, (22) [2022-11-23 14:44:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-11-23 14:44:57,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-23 14:44:57,641 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:44:57,642 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:44:57,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 14:44:57,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-23 14:44:57,848 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2022-11-23 14:44:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:44:57,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1985382166, now seen corresponding path program 1 times [2022-11-23 14:44:57,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:44:57,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241035227] [2022-11-23 14:44:57,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:57,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:44:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:59,542 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-23 14:44:59,542 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:44:59,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241035227] [2022-11-23 14:44:59,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241035227] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:44:59,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331179227] [2022-11-23 14:44:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:44:59,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:44:59,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:44:59,548 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:44:59,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 14:44:59,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:44:59,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 14:44:59,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:44:59,850 INFO L321 Elim1Store]: treesize reduction 88, result has 24.8 percent of original size [2022-11-23 14:44:59,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 8 case distinctions, treesize of input 35 treesize of output 70 [2022-11-23 14:45:02,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 55 [2022-11-23 14:45:02,367 WARN L859 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#j~2#1.base_38| Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~#i~2#1.base_38| Int)) (let ((.cse0 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#j~2#1.base_38|)) (.cse1 (select |c_ULTIMATE.start_main_old_#valid#1| |ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#i~2#1.base_38|))) (and (= .cse0 0) (= (select |c_#valid| |v_ULTIMATE.start_main_~#j~2#1.base_38|) 0) (not (= |ULTIMATE.start_main_~a~0#1.base| |v_ULTIMATE.start_main_~#i~2#1.base_38|)) (= (store (store (store (store (store (store |c_#valid| |ULTIMATE.start_main_~a~0#1.base| .cse1) |v_ULTIMATE.start_main_~#i~2#1.base_38| .cse2) |v_ULTIMATE.start_main_~#j~2#1.base_38| .cse0) |v_ULTIMATE.start_main_~#i~2#1.base_38| .cse2) |v_ULTIMATE.start_main_~#j~2#1.base_38| .cse0) |ULTIMATE.start_main_~a~0#1.base| .cse1) |c_ULTIMATE.start_main_old_#valid#1|) (= (select |c_#valid| |v_ULTIMATE.start_main_~#i~2#1.base_38|) 0) (= .cse1 0) (not (= |v_ULTIMATE.start_main_~#j~2#1.base_38| |v_ULTIMATE.start_main_~#i~2#1.base_38|)) (= (select |c_#valid| |ULTIMATE.start_main_~a~0#1.base|) 0) (= .cse2 0) (not (= |ULTIMATE.start_main_~a~0#1.base| |v_ULTIMATE.start_main_~#j~2#1.base_38|))))) is different from true [2022-11-23 14:45:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-23 14:45:02,369 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:45:02,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331179227] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:02,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:45:02,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [16] total 20 [2022-11-23 14:45:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317835052] [2022-11-23 14:45:02,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:02,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 14:45:02,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 14:45:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2022-11-23 14:45:02,371 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:45:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:03,549 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2022-11-23 14:45:03,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:03,549 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 80 [2022-11-23 14:45:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:03,550 INFO L225 Difference]: With dead ends: 76 [2022-11-23 14:45:03,550 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 14:45:03,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 69 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=67, Invalid=356, Unknown=1, NotChecked=38, Total=462 [2022-11-23 14:45:03,551 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:03,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 76 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 168 Invalid, 1 Unknown, 55 Unchecked, 1.1s Time] [2022-11-23 14:45:03,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 14:45:03,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 14:45:03,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 14:45:03,552 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2022-11-23 14:45:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:03,553 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 14:45:03,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.571428571428571) internal successors, (39), 8 states have internal predecessors, (39), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-23 14:45:03,553 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 14:45:03,553 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 14:45:03,556 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 37 remaining) [2022-11-23 14:45:03,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 37 remaining) [2022-11-23 14:45:03,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 37 remaining) [2022-11-23 14:45:03,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 37 remaining) [2022-11-23 14:45:03,557 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 37 remaining) [2022-11-23 14:45:03,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 37 remaining) [2022-11-23 14:45:03,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 37 remaining) [2022-11-23 14:45:03,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 37 remaining) [2022-11-23 14:45:03,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 37 remaining) [2022-11-23 14:45:03,558 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 37 remaining) [2022-11-23 14:45:03,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 37 remaining) [2022-11-23 14:45:03,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 37 remaining) [2022-11-23 14:45:03,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 37 remaining) [2022-11-23 14:45:03,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 37 remaining) [2022-11-23 14:45:03,559 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 37 remaining) [2022-11-23 14:45:03,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 37 remaining) [2022-11-23 14:45:03,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 37 remaining) [2022-11-23 14:45:03,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 37 remaining) [2022-11-23 14:45:03,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 37 remaining) [2022-11-23 14:45:03,560 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 37 remaining) [2022-11-23 14:45:03,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 37 remaining) [2022-11-23 14:45:03,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 37 remaining) [2022-11-23 14:45:03,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 37 remaining) [2022-11-23 14:45:03,561 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 37 remaining) [2022-11-23 14:45:03,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 37 remaining) [2022-11-23 14:45:03,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 37 remaining) [2022-11-23 14:45:03,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 37 remaining) [2022-11-23 14:45:03,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 37 remaining) [2022-11-23 14:45:03,562 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 37 remaining) [2022-11-23 14:45:03,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 37 remaining) [2022-11-23 14:45:03,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 37 remaining) [2022-11-23 14:45:03,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 37 remaining) [2022-11-23 14:45:03,563 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr32ASSERT_VIOLATIONMEMORY_FREE (4 of 37 remaining) [2022-11-23 14:45:03,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr33ASSERT_VIOLATIONMEMORY_FREE (3 of 37 remaining) [2022-11-23 14:45:03,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE (2 of 37 remaining) [2022-11-23 14:45:03,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_LEAK (1 of 37 remaining) [2022-11-23 14:45:03,564 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 37 remaining) [2022-11-23 14:45:03,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:03,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-23 14:45:03,775 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:03,777 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:45:03,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:45:03 BoogieIcfgContainer [2022-11-23 14:45:03,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:45:03,781 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:45:03,781 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:45:03,781 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:45:03,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:32:44" (3/4) ... [2022-11-23 14:45:03,785 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 14:45:03,792 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2022-11-23 14:45:03,793 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2022-11-23 14:45:03,799 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 30 nodes and edges [2022-11-23 14:45:03,799 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-11-23 14:45:03,800 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-23 14:45:03,800 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 14:45:03,854 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:45:03,854 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:45:03,855 INFO L158 Benchmark]: Toolchain (without parser) took 741103.31ms. Allocated memory was 190.8MB in the beginning and 696.3MB in the end (delta: 505.4MB). Free memory was 146.9MB in the beginning and 241.8MB in the end (delta: -94.9MB). Peak memory consumption was 413.4MB. Max. memory is 16.1GB. [2022-11-23 14:45:03,855 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 134.2MB. Free memory is still 75.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:45:03,855 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.19ms. Allocated memory is still 190.8MB. Free memory was 146.9MB in the beginning and 135.4MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-23 14:45:03,855 INFO L158 Benchmark]: Boogie Procedure Inliner took 63.13ms. Allocated memory is still 190.8MB. Free memory was 135.4MB in the beginning and 133.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:45:03,856 INFO L158 Benchmark]: Boogie Preprocessor took 28.31ms. Allocated memory is still 190.8MB. Free memory was 133.4MB in the beginning and 132.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:45:03,856 INFO L158 Benchmark]: RCFGBuilder took 863.05ms. Allocated memory is still 190.8MB. Free memory was 132.2MB in the beginning and 108.3MB in the end (delta: 23.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-23 14:45:03,856 INFO L158 Benchmark]: TraceAbstraction took 739738.59ms. Allocated memory was 190.8MB in the beginning and 696.3MB in the end (delta: 505.4MB). Free memory was 107.7MB in the beginning and 245.4MB in the end (delta: -137.8MB). Peak memory consumption was 369.4MB. Max. memory is 16.1GB. [2022-11-23 14:45:03,856 INFO L158 Benchmark]: Witness Printer took 73.44ms. Allocated memory is still 696.3MB. Free memory was 245.4MB in the beginning and 241.8MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 14:45:03,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 134.2MB. Free memory is still 75.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.19ms. Allocated memory is still 190.8MB. Free memory was 146.9MB in the beginning and 135.4MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 63.13ms. Allocated memory is still 190.8MB. Free memory was 135.4MB in the beginning and 133.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.31ms. Allocated memory is still 190.8MB. Free memory was 133.4MB in the beginning and 132.2MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 863.05ms. Allocated memory is still 190.8MB. Free memory was 132.2MB in the beginning and 108.3MB in the end (delta: 23.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 739738.59ms. Allocated memory was 190.8MB in the beginning and 696.3MB in the end (delta: 505.4MB). Free memory was 107.7MB in the beginning and 245.4MB in the end (delta: -137.8MB). Peak memory consumption was 369.4MB. Max. memory is 16.1GB. * Witness Printer took 73.44ms. Allocated memory is still 696.3MB. Free memory was 245.4MB in the beginning and 241.8MB in the end (delta: 3.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 64]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 64]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 64]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 48]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 10]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 87 locations, 37 error locations. Started 1 CEGAR loops. OverallTime: 739.7s, OverallIterations: 40, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.1s, AutomataDifference: 98.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 13 mSolverCounterUnknown, 12498 SdHoareTripleChecker+Valid, 51.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 12388 mSDsluCounter, 12806 SdHoareTripleChecker+Invalid, 48.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 190 IncrementalHoareTripleChecker+Unchecked, 10318 mSDsCounter, 2336 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18002 IncrementalHoareTripleChecker+Invalid, 20541 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2336 mSolverCounterUnsat, 2488 mSDtfsCounter, 18002 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2931 GetRequests, 1554 SyntacticMatches, 128 SemanticMatches, 1249 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 28613 ImplicationChecksByTransitivity, 384.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=32, InterpolantAutomatonStates: 500, 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, 40 MinimizatonAttempts, 1882 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 264.4s InterpolantComputationTime, 2486 NumberOfCodeBlocks, 2469 NumberOfCodeBlocksAsserted, 69 NumberOfCheckSat, 2999 ConstructedInterpolants, 228 QuantifiedInterpolants, 55274 SizeOfPredicates, 344 NumberOfNonLiveVariables, 5569 ConjunctsInSsa, 840 ConjunctsInUnsatCore, 77 InterpolantComputations, 22 PerfectInterpolantSequences, 1656/2114 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: 4.3s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 6, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 43, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 21, TOOLS_POST_TIME: 0.7s, TOOLS_POST_CALL_APPLICATIONS: 36, TOOLS_POST_CALL_TIME: 2.3s, TOOLS_POST_RETURN_APPLICATIONS: 24, TOOLS_POST_RETURN_TIME: 0.3s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 81, TOOLS_QUANTIFIERELIM_TIME: 3.3s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.2s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 104, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 45, DOMAIN_JOIN_TIME: 0.7s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME: 0.0s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 0, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 43, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 0, LOOP_SUMMARIZER_CACHE_MISSES: 0, LOOP_SUMMARIZER_OVERALL_TIME: 0.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 0, CALL_SUMMARIZER_APPLICATIONS: 24, CALL_SUMMARIZER_CACHE_MISSES: 3, 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: 472, DAG_COMPRESSION_RETAINED_NODES: 118, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 37 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-23 14:45:03,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27dbe2da-914d-498e-bed0-e260ada9bb4b/bin/utaipan-Q6hlc19bkW/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 Writing output log to file Ultimate.log Result: TRUE