./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0217_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS --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 e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a --- 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-8393723 [2022-11-19 08:23:36,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 08:23:36,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 08:23:36,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 08:23:36,739 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 08:23:36,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 08:23:36,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 08:23:36,743 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 08:23:36,745 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 08:23:36,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 08:23:36,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 08:23:36,748 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 08:23:36,748 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 08:23:36,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 08:23:36,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 08:23:36,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 08:23:36,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 08:23:36,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 08:23:36,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 08:23:36,757 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 08:23:36,759 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 08:23:36,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 08:23:36,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 08:23:36,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 08:23:36,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 08:23:36,780 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 08:23:36,781 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 08:23:36,782 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 08:23:36,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 08:23:36,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 08:23:36,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 08:23:36,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 08:23:36,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 08:23:36,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 08:23:36,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 08:23:36,794 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 08:23:36,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 08:23:36,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 08:23:36,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 08:23:36,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 08:23:36,798 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 08:23:36,799 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2022-11-19 08:23:36,836 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 08:23:36,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 08:23:36,841 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 08:23:36,841 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 08:23:36,842 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 08:23:36,842 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 08:23:36,842 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 08:23:36,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 08:23:36,843 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 08:23:36,843 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 08:23:36,844 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 08:23:36,844 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 08:23:36,844 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 08:23:36,845 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 08:23:36,845 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 08:23:36,845 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 08:23:36,845 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 08:23:36,845 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 08:23:36,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-19 08:23:36,846 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-19 08:23:36,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 08:23:36,847 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 08:23:36,847 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-19 08:23:36,847 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 08:23:36,849 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 08:23:36,849 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 08:23:36,849 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-19 08:23:36,850 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-19 08:23:36,850 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-19 08:23:36,850 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 08:23:36,851 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-19 08:23:36,851 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 08:23:36,851 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 08:23:36,851 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 08:23:36,852 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 08:23:36,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:23:36,852 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 08:23:36,852 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 08:23:36,852 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 08:23:36,853 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 08:23:36,853 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 08:23:36,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 08:23:36,853 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_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e4aac8fd1b71e0bd84f9ab8e5c238dc6bf3a295fcb9cebe504ba6d0c9a6a7b7a [2022-11-19 08:23:37,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 08:23:37,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 08:23:37,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 08:23:37,161 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 08:23:37,162 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 08:23:37,175 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-11-19 08:23:37,249 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/data/6d1de1060/df1d90f9b51a4a1b9d09b157d190a3e4/FLAG50dc126b6 [2022-11-19 08:23:37,807 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 08:23:37,809 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/sv-benchmarks/c/list-ext-properties/test-0217_1.i [2022-11-19 08:23:37,832 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/data/6d1de1060/df1d90f9b51a4a1b9d09b157d190a3e4/FLAG50dc126b6 [2022-11-19 08:23:38,079 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/data/6d1de1060/df1d90f9b51a4a1b9d09b157d190a3e4 [2022-11-19 08:23:38,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 08:23:38,088 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 08:23:38,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 08:23:38,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 08:23:38,094 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 08:23:38,095 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cda8c59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38, skipping insertion in model container [2022-11-19 08:23:38,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 08:23:38,167 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 08:23:38,598 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:23:38,615 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 08:23:38,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 08:23:38,719 INFO L208 MainTranslator]: Completed translation [2022-11-19 08:23:38,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38 WrapperNode [2022-11-19 08:23:38,719 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 08:23:38,721 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 08:23:38,721 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 08:23:38,721 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 08:23:38,728 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,744 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,772 INFO L138 Inliner]: procedures = 181, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 249 [2022-11-19 08:23:38,772 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 08:23:38,773 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 08:23:38,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 08:23:38,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 08:23:38,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,788 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,806 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,808 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,812 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 08:23:38,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 08:23:38,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 08:23:38,813 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 08:23:38,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (1/1) ... [2022-11-19 08:23:38,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 08:23:38,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:38,859 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 08:23:38,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 08:23:38,903 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2022-11-19 08:23:38,904 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2022-11-19 08:23:38,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 08:23:38,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-19 08:23:38,904 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 08:23:38,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-19 08:23:38,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-19 08:23:38,905 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 08:23:38,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-11-19 08:23:38,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 08:23:38,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 08:23:38,906 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 08:23:39,145 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 08:23:39,147 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 08:23:39,786 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 08:23:39,914 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 08:23:39,914 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-19 08:23:39,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:23:39 BoogieIcfgContainer [2022-11-19 08:23:39,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 08:23:39,920 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 08:23:39,920 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 08:23:39,923 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 08:23:39,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:23:38" (1/3) ... [2022-11-19 08:23:39,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d998b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:23:39, skipping insertion in model container [2022-11-19 08:23:39,925 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:23:38" (2/3) ... [2022-11-19 08:23:39,925 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21d998b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:23:39, skipping insertion in model container [2022-11-19 08:23:39,926 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:23:39" (3/3) ... [2022-11-19 08:23:39,927 INFO L112 eAbstractionObserver]: Analyzing ICFG test-0217_1.i [2022-11-19 08:23:39,946 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 08:23:39,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 67 error locations. [2022-11-19 08:23:40,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 08:23:40,031 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;@7f8df508, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 08:23:40,032 INFO L358 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2022-11-19 08:23:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:23:40,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-19 08:23:40,043 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:40,043 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-19 08:23:40,045 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:40,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:40,052 INFO L85 PathProgramCache]: Analyzing trace with hash 10973079, now seen corresponding path program 1 times [2022-11-19 08:23:40,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:40,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131410750] [2022-11-19 08:23:40,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:40,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:40,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:40,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131410750] [2022-11-19 08:23:40,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131410750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:40,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:40,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:23:40,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301543763] [2022-11-19 08:23:40,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:40,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-19 08:23:40,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:40,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-19 08:23:40,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:23:40,288 INFO L87 Difference]: Start difference. First operand has 138 states, 67 states have (on average 2.2686567164179103) internal successors, (152), 134 states have internal predecessors, (152), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:40,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:40,409 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-11-19 08:23:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-19 08:23:40,411 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-11-19 08:23:40,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:40,419 INFO L225 Difference]: With dead ends: 138 [2022-11-19 08:23:40,420 INFO L226 Difference]: Without dead ends: 137 [2022-11-19 08:23:40,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-19 08:23:40,425 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:40,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 126 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:23:40,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-19 08:23:40,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-19 08:23:40,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 67 states have (on average 2.1940298507462686) internal successors, (147), 133 states have internal predecessors, (147), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:23:40,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-11-19 08:23:40,493 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 4 [2022-11-19 08:23:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:40,493 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-11-19 08:23:40,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:40,494 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-11-19 08:23:40,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:23:40,494 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:40,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:23:40,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 08:23:40,495 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr59REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:40,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:40,496 INFO L85 PathProgramCache]: Analyzing trace with hash 341942440, now seen corresponding path program 1 times [2022-11-19 08:23:40,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:40,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25564055] [2022-11-19 08:23:40,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:40,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:40,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:40,643 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:40,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25564055] [2022-11-19 08:23:40,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25564055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:40,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:40,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:23:40,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040156785] [2022-11-19 08:23:40,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:40,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:23:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:40,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:23:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:23:40,649 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:40,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:40,918 INFO L93 Difference]: Finished difference Result 267 states and 294 transitions. [2022-11-19 08:23:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:23:40,919 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:23:40,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:40,924 INFO L225 Difference]: With dead ends: 267 [2022-11-19 08:23:40,925 INFO L226 Difference]: Without dead ends: 267 [2022-11-19 08:23:40,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:23:40,927 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 135 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:40,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 154 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:40,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-11-19 08:23:40,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 180. [2022-11-19 08:23:40,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 107 states have (on average 2.177570093457944) internal successors, (233), 173 states have internal predecessors, (233), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:23:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 241 transitions. [2022-11-19 08:23:40,963 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 241 transitions. Word has length 5 [2022-11-19 08:23:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:40,963 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 241 transitions. [2022-11-19 08:23:40,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 241 transitions. [2022-11-19 08:23:40,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-19 08:23:40,964 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:40,964 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-19 08:23:40,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-19 08:23:40,964 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:40,965 INFO L85 PathProgramCache]: Analyzing trace with hash 341942441, now seen corresponding path program 1 times [2022-11-19 08:23:40,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:40,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799194971] [2022-11-19 08:23:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:40,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:41,258 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:41,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799194971] [2022-11-19 08:23:41,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799194971] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:41,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:41,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:23:41,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006071943] [2022-11-19 08:23:41,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:41,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:23:41,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:41,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:23:41,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:23:41,260 INFO L87 Difference]: Start difference. First operand 180 states and 241 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:41,616 INFO L93 Difference]: Finished difference Result 284 states and 363 transitions. [2022-11-19 08:23:41,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:23:41,616 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-19 08:23:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:41,618 INFO L225 Difference]: With dead ends: 284 [2022-11-19 08:23:41,619 INFO L226 Difference]: Without dead ends: 284 [2022-11-19 08:23:41,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:41,620 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 102 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:41,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 274 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-11-19 08:23:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 240. [2022-11-19 08:23:41,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 161 states have (on average 2.0683229813664594) internal successors, (333), 229 states have internal predecessors, (333), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:23:41,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 349 transitions. [2022-11-19 08:23:41,637 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 349 transitions. Word has length 5 [2022-11-19 08:23:41,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:41,638 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 349 transitions. [2022-11-19 08:23:41,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:41,639 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 349 transitions. [2022-11-19 08:23:41,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:23:41,639 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:41,639 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:41,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-19 08:23:41,640 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:41,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2105748153, now seen corresponding path program 1 times [2022-11-19 08:23:41,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:41,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749275638] [2022-11-19 08:23:41,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:41,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:41,685 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:41,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749275638] [2022-11-19 08:23:41,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749275638] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:41,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:41,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-19 08:23:41,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071434482] [2022-11-19 08:23:41,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:41,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:23:41,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:23:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:23:41,688 INFO L87 Difference]: Start difference. First operand 240 states and 349 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:41,863 INFO L93 Difference]: Finished difference Result 296 states and 402 transitions. [2022-11-19 08:23:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:23:41,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:23:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:41,867 INFO L225 Difference]: With dead ends: 296 [2022-11-19 08:23:41,867 INFO L226 Difference]: Without dead ends: 295 [2022-11-19 08:23:41,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:23:41,869 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 68 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:41,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 179 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:41,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-11-19 08:23:41,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 241. [2022-11-19 08:23:41,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 162 states have (on average 2.0617283950617282) internal successors, (334), 230 states have internal predecessors, (334), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:23:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 350 transitions. [2022-11-19 08:23:41,883 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 350 transitions. Word has length 7 [2022-11-19 08:23:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:41,884 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 350 transitions. [2022-11-19 08:23:41,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 350 transitions. [2022-11-19 08:23:41,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 08:23:41,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:41,885 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:41,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-19 08:23:41,886 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:41,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash -2105749903, now seen corresponding path program 1 times [2022-11-19 08:23:41,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:41,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052727657] [2022-11-19 08:23:41,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:41,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:41,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:41,926 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:41,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052727657] [2022-11-19 08:23:41,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052727657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:41,927 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:41,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:23:41,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793537792] [2022-11-19 08:23:41,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:41,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:23:41,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:23:41,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:23:41,930 INFO L87 Difference]: Start difference. First operand 241 states and 350 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:42,021 INFO L93 Difference]: Finished difference Result 350 states and 469 transitions. [2022-11-19 08:23:42,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:23:42,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 08:23:42,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:42,023 INFO L225 Difference]: With dead ends: 350 [2022-11-19 08:23:42,024 INFO L226 Difference]: Without dead ends: 347 [2022-11-19 08:23:42,024 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 [2022-11-19 08:23:42,025 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 128 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:42,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 251 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:23:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-11-19 08:23:42,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 239. [2022-11-19 08:23:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 160 states have (on average 2.06875) internal successors, (331), 228 states have internal predecessors, (331), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:23:42,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 347 transitions. [2022-11-19 08:23:42,039 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 347 transitions. Word has length 7 [2022-11-19 08:23:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:42,039 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 347 transitions. [2022-11-19 08:23:42,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 08:23:42,040 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 347 transitions. [2022-11-19 08:23:42,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:23:42,041 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:42,041 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:42,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-19 08:23:42,041 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:42,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:42,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1895671887, now seen corresponding path program 1 times [2022-11-19 08:23:42,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:42,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082603245] [2022-11-19 08:23:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:42,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:42,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:42,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:42,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082603245] [2022-11-19 08:23:42,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082603245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:42,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:42,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:23:42,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876104407] [2022-11-19 08:23:42,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:42,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:23:42,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:42,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:23:42,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:23:42,254 INFO L87 Difference]: Start difference. First operand 239 states and 347 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:42,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:42,667 INFO L93 Difference]: Finished difference Result 442 states and 521 transitions. [2022-11-19 08:23:42,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-19 08:23:42,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:42,670 INFO L225 Difference]: With dead ends: 442 [2022-11-19 08:23:42,670 INFO L226 Difference]: Without dead ends: 442 [2022-11-19 08:23:42,670 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 [2022-11-19 08:23:42,673 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 385 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:42,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 267 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:23:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-11-19 08:23:42,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 236. [2022-11-19 08:23:42,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 2.018633540372671) internal successors, (325), 225 states have internal predecessors, (325), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:23:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 341 transitions. [2022-11-19 08:23:42,692 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 341 transitions. Word has length 10 [2022-11-19 08:23:42,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:42,693 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 341 transitions. [2022-11-19 08:23:42,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 341 transitions. [2022-11-19 08:23:42,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-19 08:23:42,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:42,694 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:42,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-19 08:23:42,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:42,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1895671886, now seen corresponding path program 1 times [2022-11-19 08:23:42,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:42,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822123839] [2022-11-19 08:23:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:42,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:42,970 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:42,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822123839] [2022-11-19 08:23:42,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822123839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:42,970 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:42,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:23:42,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172575416] [2022-11-19 08:23:42,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:42,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:23:42,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:23:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:23:42,972 INFO L87 Difference]: Start difference. First operand 236 states and 341 transitions. Second operand has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:43,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:43,886 INFO L93 Difference]: Finished difference Result 535 states and 656 transitions. [2022-11-19 08:23:43,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:23:43,887 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2022-11-19 08:23:43,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:43,889 INFO L225 Difference]: With dead ends: 535 [2022-11-19 08:23:43,890 INFO L226 Difference]: Without dead ends: 535 [2022-11-19 08:23:43,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:23:43,891 INFO L413 NwaCegarLoop]: 86 mSDtfsCounter, 503 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 507 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:43,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [507 Valid, 351 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:23:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-11-19 08:23:43,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 250. [2022-11-19 08:23:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 175 states have (on average 2.0228571428571427) internal successors, (354), 239 states have internal predecessors, (354), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:23:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 370 transitions. [2022-11-19 08:23:43,903 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 370 transitions. Word has length 10 [2022-11-19 08:23:43,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:43,903 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 370 transitions. [2022-11-19 08:23:43,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 370 transitions. [2022-11-19 08:23:43,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:23:43,904 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:43,905 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:43,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-19 08:23:43,905 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:43,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:43,906 INFO L85 PathProgramCache]: Analyzing trace with hash -553924093, now seen corresponding path program 1 times [2022-11-19 08:23:43,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295103285] [2022-11-19 08:23:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:43,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:44,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:44,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295103285] [2022-11-19 08:23:44,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295103285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:44,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:44,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:23:44,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219578468] [2022-11-19 08:23:44,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:44,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:23:44,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:44,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:23:44,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:23:44,021 INFO L87 Difference]: Start difference. First operand 250 states and 370 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:44,355 INFO L93 Difference]: Finished difference Result 446 states and 588 transitions. [2022-11-19 08:23:44,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:23:44,357 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-19 08:23:44,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:44,359 INFO L225 Difference]: With dead ends: 446 [2022-11-19 08:23:44,359 INFO L226 Difference]: Without dead ends: 446 [2022-11-19 08:23:44,359 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 [2022-11-19 08:23:44,360 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 250 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:44,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 264 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:44,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-19 08:23:44,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 256. [2022-11-19 08:23:44,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.988950276243094) internal successors, (360), 245 states have internal predecessors, (360), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:23:44,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 376 transitions. [2022-11-19 08:23:44,370 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 376 transitions. Word has length 12 [2022-11-19 08:23:44,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:44,370 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 376 transitions. [2022-11-19 08:23:44,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:44,370 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 376 transitions. [2022-11-19 08:23:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 08:23:44,371 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:44,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:44,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-19 08:23:44,372 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:44,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:44,372 INFO L85 PathProgramCache]: Analyzing trace with hash -553924092, now seen corresponding path program 1 times [2022-11-19 08:23:44,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:44,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430234218] [2022-11-19 08:23:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:44,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:44,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:44,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:44,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:44,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430234218] [2022-11-19 08:23:44,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430234218] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:44,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:44,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:23:44,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469535659] [2022-11-19 08:23:44,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:44,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:23:44,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:23:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:23:44,482 INFO L87 Difference]: Start difference. First operand 256 states and 376 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:44,751 INFO L93 Difference]: Finished difference Result 298 states and 388 transitions. [2022-11-19 08:23:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:23:44,754 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-11-19 08:23:44,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:44,755 INFO L225 Difference]: With dead ends: 298 [2022-11-19 08:23:44,755 INFO L226 Difference]: Without dead ends: 298 [2022-11-19 08:23:44,755 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 [2022-11-19 08:23:44,756 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 142 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:44,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 262 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-11-19 08:23:44,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 256. [2022-11-19 08:23:44,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 181 states have (on average 1.9558011049723756) internal successors, (354), 245 states have internal predecessors, (354), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-19 08:23:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 370 transitions. [2022-11-19 08:23:44,765 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 370 transitions. Word has length 12 [2022-11-19 08:23:44,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:44,766 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 370 transitions. [2022-11-19 08:23:44,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 370 transitions. [2022-11-19 08:23:44,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-19 08:23:44,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:44,767 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:44,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-19 08:23:44,768 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:44,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:44,777 INFO L85 PathProgramCache]: Analyzing trace with hash 571486522, now seen corresponding path program 1 times [2022-11-19 08:23:44,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:44,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776591633] [2022-11-19 08:23:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:44,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:44,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:45,099 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:45,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776591633] [2022-11-19 08:23:45,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776591633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:45,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:45,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:23:45,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388336468] [2022-11-19 08:23:45,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:45,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:23:45,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:45,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:23:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:23:45,102 INFO L87 Difference]: Start difference. First operand 256 states and 370 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:45,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:45,426 INFO L93 Difference]: Finished difference Result 340 states and 463 transitions. [2022-11-19 08:23:45,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:23:45,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-19 08:23:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:45,429 INFO L225 Difference]: With dead ends: 340 [2022-11-19 08:23:45,429 INFO L226 Difference]: Without dead ends: 340 [2022-11-19 08:23:45,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:23:45,430 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 82 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:45,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 636 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:45,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-11-19 08:23:45,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 296. [2022-11-19 08:23:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 218 states have (on average 1.9036697247706422) internal successors, (415), 281 states have internal predecessors, (415), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:45,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 435 transitions. [2022-11-19 08:23:45,438 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 435 transitions. Word has length 13 [2022-11-19 08:23:45,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:45,438 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 435 transitions. [2022-11-19 08:23:45,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:45,439 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 435 transitions. [2022-11-19 08:23:45,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:23:45,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:45,439 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:45,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-19 08:23:45,440 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash 536500504, now seen corresponding path program 1 times [2022-11-19 08:23:45,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:45,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142701983] [2022-11-19 08:23:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:45,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:45,479 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:45,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142701983] [2022-11-19 08:23:45,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142701983] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:45,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:45,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 08:23:45,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112279802] [2022-11-19 08:23:45,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:45,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 08:23:45,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:45,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 08:23:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 08:23:45,484 INFO L87 Difference]: Start difference. First operand 296 states and 435 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:45,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:45,645 INFO L93 Difference]: Finished difference Result 370 states and 511 transitions. [2022-11-19 08:23:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 08:23:45,645 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-19 08:23:45,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:45,647 INFO L225 Difference]: With dead ends: 370 [2022-11-19 08:23:45,647 INFO L226 Difference]: Without dead ends: 370 [2022-11-19 08:23:45,647 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 [2022-11-19 08:23:45,648 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 123 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:45,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 180 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:23:45,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-11-19 08:23:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 293. [2022-11-19 08:23:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 218 states have (on average 1.8623853211009174) internal successors, (406), 278 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 426 transitions. [2022-11-19 08:23:45,657 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 426 transitions. Word has length 14 [2022-11-19 08:23:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:45,657 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 426 transitions. [2022-11-19 08:23:45,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 426 transitions. [2022-11-19 08:23:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-19 08:23:45,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:45,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:45,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-19 08:23:45,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:45,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:45,659 INFO L85 PathProgramCache]: Analyzing trace with hash 536500505, now seen corresponding path program 1 times [2022-11-19 08:23:45,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:45,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471588196] [2022-11-19 08:23:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:45,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:46,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:46,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:46,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471588196] [2022-11-19 08:23:46,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471588196] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:46,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:46,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:23:46,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214394075] [2022-11-19 08:23:46,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:46,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:23:46,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:46,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:23:46,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:23:46,032 INFO L87 Difference]: Start difference. First operand 293 states and 426 transitions. Second operand has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:46,354 INFO L93 Difference]: Finished difference Result 324 states and 425 transitions. [2022-11-19 08:23:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:23:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-11-19 08:23:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:46,356 INFO L225 Difference]: With dead ends: 324 [2022-11-19 08:23:46,356 INFO L226 Difference]: Without dead ends: 324 [2022-11-19 08:23:46,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:23:46,357 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 461 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:46,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 414 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:46,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-11-19 08:23:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 291. [2022-11-19 08:23:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 218 states have (on average 1.834862385321101) internal successors, (400), 276 states have internal predecessors, (400), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:46,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 420 transitions. [2022-11-19 08:23:46,368 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 420 transitions. Word has length 14 [2022-11-19 08:23:46,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:46,368 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 420 transitions. [2022-11-19 08:23:46,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:46,368 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 420 transitions. [2022-11-19 08:23:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:23:46,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:46,370 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:46,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-19 08:23:46,370 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:46,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:46,371 INFO L85 PathProgramCache]: Analyzing trace with hash 280474764, now seen corresponding path program 1 times [2022-11-19 08:23:46,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:46,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506139753] [2022-11-19 08:23:46,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:46,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:46,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:46,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506139753] [2022-11-19 08:23:46,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506139753] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:46,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:46,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:23:46,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167364085] [2022-11-19 08:23:46,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:46,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:23:46,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:46,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:23:46,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:23:46,748 INFO L87 Difference]: Start difference. First operand 291 states and 420 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:47,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:47,323 INFO L93 Difference]: Finished difference Result 541 states and 742 transitions. [2022-11-19 08:23:47,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:23:47,324 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-19 08:23:47,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:47,326 INFO L225 Difference]: With dead ends: 541 [2022-11-19 08:23:47,326 INFO L226 Difference]: Without dead ends: 539 [2022-11-19 08:23:47,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:23:47,327 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 307 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:47,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 747 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:23:47,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-11-19 08:23:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 285. [2022-11-19 08:23:47,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 212 states have (on average 1.8349056603773586) internal successors, (389), 270 states have internal predecessors, (389), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:47,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 409 transitions. [2022-11-19 08:23:47,338 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 409 transitions. Word has length 16 [2022-11-19 08:23:47,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:47,338 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 409 transitions. [2022-11-19 08:23:47,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:47,338 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 409 transitions. [2022-11-19 08:23:47,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:23:47,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:47,342 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:47,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-19 08:23:47,343 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:47,344 INFO L85 PathProgramCache]: Analyzing trace with hash 180911547, now seen corresponding path program 1 times [2022-11-19 08:23:47,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:47,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199295543] [2022-11-19 08:23:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:47,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:47,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:47,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:47,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:47,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199295543] [2022-11-19 08:23:47,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199295543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:47,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:47,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:23:47,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670620190] [2022-11-19 08:23:47,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:47,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 08:23:47,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:47,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 08:23:47,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:23:47,621 INFO L87 Difference]: Start difference. First operand 285 states and 409 transitions. Second operand has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:47,922 INFO L93 Difference]: Finished difference Result 317 states and 411 transitions. [2022-11-19 08:23:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:23:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-19 08:23:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:47,924 INFO L225 Difference]: With dead ends: 317 [2022-11-19 08:23:47,924 INFO L226 Difference]: Without dead ends: 317 [2022-11-19 08:23:47,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:23:47,925 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 327 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:47,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [329 Valid, 461 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:47,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-11-19 08:23:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 284. [2022-11-19 08:23:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 212 states have (on average 1.820754716981132) internal successors, (386), 269 states have internal predecessors, (386), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 406 transitions. [2022-11-19 08:23:47,932 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 406 transitions. Word has length 16 [2022-11-19 08:23:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:47,932 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 406 transitions. [2022-11-19 08:23:47,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 406 transitions. [2022-11-19 08:23:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-19 08:23:47,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:47,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:47,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-19 08:23:47,933 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:47,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:47,934 INFO L85 PathProgramCache]: Analyzing trace with hash 180911354, now seen corresponding path program 1 times [2022-11-19 08:23:47,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:47,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700439209] [2022-11-19 08:23:47,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:47,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:48,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:48,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700439209] [2022-11-19 08:23:48,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700439209] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:48,017 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:48,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:23:48,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441249879] [2022-11-19 08:23:48,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:48,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:48,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:48,018 INFO L87 Difference]: Start difference. First operand 284 states and 406 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:48,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:48,203 INFO L93 Difference]: Finished difference Result 436 states and 593 transitions. [2022-11-19 08:23:48,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:23:48,204 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-19 08:23:48,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:48,205 INFO L225 Difference]: With dead ends: 436 [2022-11-19 08:23:48,206 INFO L226 Difference]: Without dead ends: 436 [2022-11-19 08:23:48,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:23:48,206 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 123 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:48,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 425 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-11-19 08:23:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 302. [2022-11-19 08:23:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 230 states have (on average 1.7652173913043478) internal successors, (406), 287 states have internal predecessors, (406), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:48,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 426 transitions. [2022-11-19 08:23:48,215 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 426 transitions. Word has length 16 [2022-11-19 08:23:48,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:48,215 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 426 transitions. [2022-11-19 08:23:48,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:48,215 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 426 transitions. [2022-11-19 08:23:48,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:23:48,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:48,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:48,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-19 08:23:48,216 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:48,217 INFO L85 PathProgramCache]: Analyzing trace with hash 105155647, now seen corresponding path program 1 times [2022-11-19 08:23:48,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:48,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301358385] [2022-11-19 08:23:48,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:48,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:48,273 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:48,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301358385] [2022-11-19 08:23:48,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301358385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:48,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:48,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:23:48,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915326638] [2022-11-19 08:23:48,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:48,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:23:48,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:23:48,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:23:48,275 INFO L87 Difference]: Start difference. First operand 302 states and 426 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:48,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:48,561 INFO L93 Difference]: Finished difference Result 492 states and 634 transitions. [2022-11-19 08:23:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:23:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-19 08:23:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:48,564 INFO L225 Difference]: With dead ends: 492 [2022-11-19 08:23:48,564 INFO L226 Difference]: Without dead ends: 492 [2022-11-19 08:23:48,564 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 [2022-11-19 08:23:48,565 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 223 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:48,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 260 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-11-19 08:23:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 318. [2022-11-19 08:23:48,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7967479674796747) internal successors, (442), 303 states have internal predecessors, (442), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:48,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 462 transitions. [2022-11-19 08:23:48,574 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 462 transitions. Word has length 17 [2022-11-19 08:23:48,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:48,575 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 462 transitions. [2022-11-19 08:23:48,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:48,575 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 462 transitions. [2022-11-19 08:23:48,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-19 08:23:48,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:48,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:48,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-19 08:23:48,576 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash 105155648, now seen corresponding path program 1 times [2022-11-19 08:23:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:48,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259397361] [2022-11-19 08:23:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:48,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:48,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:48,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:48,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259397361] [2022-11-19 08:23:48,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259397361] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:48,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:48,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:23:48,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946477889] [2022-11-19 08:23:48,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:48,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:48,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:48,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:48,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:48,732 INFO L87 Difference]: Start difference. First operand 318 states and 462 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:49,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:49,010 INFO L93 Difference]: Finished difference Result 356 states and 470 transitions. [2022-11-19 08:23:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:23:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-11-19 08:23:49,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:49,013 INFO L225 Difference]: With dead ends: 356 [2022-11-19 08:23:49,013 INFO L226 Difference]: Without dead ends: 356 [2022-11-19 08:23:49,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:23:49,013 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 136 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:49,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 323 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:49,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-11-19 08:23:49,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 318. [2022-11-19 08:23:49,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 246 states have (on average 1.7601626016260163) internal successors, (433), 303 states have internal predecessors, (433), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 453 transitions. [2022-11-19 08:23:49,022 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 453 transitions. Word has length 17 [2022-11-19 08:23:49,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:49,022 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 453 transitions. [2022-11-19 08:23:49,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 453 transitions. [2022-11-19 08:23:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:23:49,023 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:49,023 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:49,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-19 08:23:49,024 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:49,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1660906589, now seen corresponding path program 1 times [2022-11-19 08:23:49,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:49,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340086163] [2022-11-19 08:23:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:49,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:49,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:49,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:49,195 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:49,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340086163] [2022-11-19 08:23:49,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340086163] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:49,196 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:49,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:23:49,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784957297] [2022-11-19 08:23:49,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:49,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:23:49,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:49,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:23:49,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:23:49,197 INFO L87 Difference]: Start difference. First operand 318 states and 453 transitions. Second operand has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:49,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:49,648 INFO L93 Difference]: Finished difference Result 479 states and 649 transitions. [2022-11-19 08:23:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 08:23:49,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-19 08:23:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:49,650 INFO L225 Difference]: With dead ends: 479 [2022-11-19 08:23:49,650 INFO L226 Difference]: Without dead ends: 479 [2022-11-19 08:23:49,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:23:49,651 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 385 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:49,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 731 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:49,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-11-19 08:23:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 315. [2022-11-19 08:23:49,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 246 states have (on average 1.7195121951219512) internal successors, (423), 300 states have internal predecessors, (423), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:49,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 443 transitions. [2022-11-19 08:23:49,660 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 443 transitions. Word has length 20 [2022-11-19 08:23:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:49,660 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 443 transitions. [2022-11-19 08:23:49,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 3.0) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 443 transitions. [2022-11-19 08:23:49,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:23:49,661 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:49,661 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:49,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-19 08:23:49,662 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:49,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:49,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1591482284, now seen corresponding path program 1 times [2022-11-19 08:23:49,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:49,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729795120] [2022-11-19 08:23:49,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:49,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:49,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:49,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:49,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729795120] [2022-11-19 08:23:49,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729795120] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:49,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:49,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:23:49,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397199915] [2022-11-19 08:23:49,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:49,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:49,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:49,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:49,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:49,741 INFO L87 Difference]: Start difference. First operand 315 states and 443 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:49,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:49,978 INFO L93 Difference]: Finished difference Result 388 states and 523 transitions. [2022-11-19 08:23:49,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:49,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-19 08:23:49,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:49,980 INFO L225 Difference]: With dead ends: 388 [2022-11-19 08:23:49,980 INFO L226 Difference]: Without dead ends: 388 [2022-11-19 08:23:49,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:23:49,981 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 301 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:49,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 286 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:49,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-11-19 08:23:49,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 314. [2022-11-19 08:23:49,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 246 states have (on average 1.7113821138211383) internal successors, (421), 299 states have internal predecessors, (421), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 441 transitions. [2022-11-19 08:23:49,991 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 441 transitions. Word has length 20 [2022-11-19 08:23:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:49,992 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 441 transitions. [2022-11-19 08:23:49,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 441 transitions. [2022-11-19 08:23:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-19 08:23:49,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:49,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:49,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-19 08:23:49,993 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:49,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:49,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1591482285, now seen corresponding path program 1 times [2022-11-19 08:23:49,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:49,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723585846] [2022-11-19 08:23:49,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:49,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:50,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:50,185 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:50,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723585846] [2022-11-19 08:23:50,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723585846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:50,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:50,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:23:50,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750929626] [2022-11-19 08:23:50,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:50,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:50,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:50,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:50,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:50,188 INFO L87 Difference]: Start difference. First operand 314 states and 441 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:50,400 INFO L93 Difference]: Finished difference Result 338 states and 441 transitions. [2022-11-19 08:23:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-11-19 08:23:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:50,402 INFO L225 Difference]: With dead ends: 338 [2022-11-19 08:23:50,403 INFO L226 Difference]: Without dead ends: 338 [2022-11-19 08:23:50,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:23:50,403 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 324 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:50,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 302 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-11-19 08:23:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 313. [2022-11-19 08:23:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 246 states have (on average 1.7032520325203253) internal successors, (419), 298 states have internal predecessors, (419), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 439 transitions. [2022-11-19 08:23:50,411 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 439 transitions. Word has length 20 [2022-11-19 08:23:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:50,411 INFO L495 AbstractCegarLoop]: Abstraction has 313 states and 439 transitions. [2022-11-19 08:23:50,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 439 transitions. [2022-11-19 08:23:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:23:50,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:50,413 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:50,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-19 08:23:50,413 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr50REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:50,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:50,413 INFO L85 PathProgramCache]: Analyzing trace with hash -51500377, now seen corresponding path program 1 times [2022-11-19 08:23:50,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:50,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930392583] [2022-11-19 08:23:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:50,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:50,711 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:50,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930392583] [2022-11-19 08:23:50,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930392583] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:50,711 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:50,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-19 08:23:50,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481782589] [2022-11-19 08:23:50,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:50,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:23:50,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:50,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:23:50,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:23:50,713 INFO L87 Difference]: Start difference. First operand 313 states and 439 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:51,072 INFO L93 Difference]: Finished difference Result 350 states and 461 transitions. [2022-11-19 08:23:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:23:51,073 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-19 08:23:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:51,074 INFO L225 Difference]: With dead ends: 350 [2022-11-19 08:23:51,074 INFO L226 Difference]: Without dead ends: 350 [2022-11-19 08:23:51,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:23:51,075 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 97 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:51,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 500 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:51,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-11-19 08:23:51,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 309. [2022-11-19 08:23:51,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.6900826446280992) internal successors, (409), 294 states have internal predecessors, (409), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:51,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 429 transitions. [2022-11-19 08:23:51,082 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 429 transitions. Word has length 21 [2022-11-19 08:23:51,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:51,083 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 429 transitions. [2022-11-19 08:23:51,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:51,083 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 429 transitions. [2022-11-19 08:23:51,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-19 08:23:51,083 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:51,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:51,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-19 08:23:51,084 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr43ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:51,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:51,084 INFO L85 PathProgramCache]: Analyzing trace with hash -51525946, now seen corresponding path program 1 times [2022-11-19 08:23:51,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:51,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24540799] [2022-11-19 08:23:51,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:51,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:51,228 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24540799] [2022-11-19 08:23:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24540799] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:51,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:51,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:23:51,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185512905] [2022-11-19 08:23:51,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:51,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:51,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:51,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:51,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:51,230 INFO L87 Difference]: Start difference. First operand 309 states and 429 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:51,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:51,438 INFO L93 Difference]: Finished difference Result 349 states and 460 transitions. [2022-11-19 08:23:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:23:51,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-11-19 08:23:51,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:51,441 INFO L225 Difference]: With dead ends: 349 [2022-11-19 08:23:51,441 INFO L226 Difference]: Without dead ends: 349 [2022-11-19 08:23:51,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:23:51,442 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 97 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:51,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 407 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:51,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-19 08:23:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 309. [2022-11-19 08:23:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 242 states have (on average 1.6859504132231404) internal successors, (408), 294 states have internal predecessors, (408), 10 states have call successors, (10), 5 states have call predecessors, (10), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-19 08:23:51,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 428 transitions. [2022-11-19 08:23:51,449 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 428 transitions. Word has length 21 [2022-11-19 08:23:51,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:51,449 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 428 transitions. [2022-11-19 08:23:51,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:51,449 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 428 transitions. [2022-11-19 08:23:51,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:23:51,450 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:51,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:51,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-11-19 08:23:51,450 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:51,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:51,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1597304068, now seen corresponding path program 1 times [2022-11-19 08:23:51,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:51,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180499676] [2022-11-19 08:23:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:51,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:51,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:51,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:51,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180499676] [2022-11-19 08:23:51,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180499676] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:51,618 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:51,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:23:51,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623083514] [2022-11-19 08:23:51,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:51,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:51,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:51,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:51,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:51,620 INFO L87 Difference]: Start difference. First operand 309 states and 428 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:51,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:51,889 INFO L93 Difference]: Finished difference Result 404 states and 535 transitions. [2022-11-19 08:23:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-19 08:23:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:51,892 INFO L225 Difference]: With dead ends: 404 [2022-11-19 08:23:51,892 INFO L226 Difference]: Without dead ends: 404 [2022-11-19 08:23:51,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:23:51,892 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 138 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:51,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 381 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:23:51,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-11-19 08:23:51,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 340. [2022-11-19 08:23:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 270 states have (on average 1.6703703703703703) internal successors, (451), 323 states have internal predecessors, (451), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 08:23:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 475 transitions. [2022-11-19 08:23:51,901 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 475 transitions. Word has length 22 [2022-11-19 08:23:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:51,902 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 475 transitions. [2022-11-19 08:23:51,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 475 transitions. [2022-11-19 08:23:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:23:51,903 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:51,903 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:51,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-19 08:23:51,903 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:51,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:51,904 INFO L85 PathProgramCache]: Analyzing trace with hash 406121229, now seen corresponding path program 1 times [2022-11-19 08:23:51,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:51,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862281431] [2022-11-19 08:23:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:51,979 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:51,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862281431] [2022-11-19 08:23:51,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862281431] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:51,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:51,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:23:51,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317640748] [2022-11-19 08:23:51,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:51,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:23:51,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:51,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:23:51,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:51,981 INFO L87 Difference]: Start difference. First operand 340 states and 475 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:52,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:52,274 INFO L93 Difference]: Finished difference Result 645 states and 833 transitions. [2022-11-19 08:23:52,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:52,274 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-19 08:23:52,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:52,277 INFO L225 Difference]: With dead ends: 645 [2022-11-19 08:23:52,277 INFO L226 Difference]: Without dead ends: 645 [2022-11-19 08:23:52,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:23:52,278 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 509 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:52,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 325 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2022-11-19 08:23:52,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 337. [2022-11-19 08:23:52,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 270 states have (on average 1.6481481481481481) internal successors, (445), 320 states have internal predecessors, (445), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 08:23:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 469 transitions. [2022-11-19 08:23:52,288 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 469 transitions. Word has length 22 [2022-11-19 08:23:52,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:52,289 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 469 transitions. [2022-11-19 08:23:52,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 469 transitions. [2022-11-19 08:23:52,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:23:52,289 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:52,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:52,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-11-19 08:23:52,290 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:52,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:52,290 INFO L85 PathProgramCache]: Analyzing trace with hash 406121230, now seen corresponding path program 1 times [2022-11-19 08:23:52,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:52,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173833800] [2022-11-19 08:23:52,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:52,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:52,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:52,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173833800] [2022-11-19 08:23:52,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173833800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:52,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:52,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:23:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109069856] [2022-11-19 08:23:52,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:52,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:23:52,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:52,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:23:52,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:23:52,459 INFO L87 Difference]: Start difference. First operand 337 states and 469 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:52,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:52,805 INFO L93 Difference]: Finished difference Result 520 states and 667 transitions. [2022-11-19 08:23:52,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:23:52,806 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-19 08:23:52,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:52,807 INFO L225 Difference]: With dead ends: 520 [2022-11-19 08:23:52,808 INFO L226 Difference]: Without dead ends: 520 [2022-11-19 08:23:52,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:23:52,808 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 604 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:52,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 396 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:52,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-11-19 08:23:52,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 336. [2022-11-19 08:23:52,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 270 states have (on average 1.6407407407407408) internal successors, (443), 319 states have internal predecessors, (443), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 08:23:52,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 467 transitions. [2022-11-19 08:23:52,818 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 467 transitions. Word has length 22 [2022-11-19 08:23:52,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:52,818 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 467 transitions. [2022-11-19 08:23:52,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 6 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:52,818 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 467 transitions. [2022-11-19 08:23:52,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-19 08:23:52,819 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:52,819 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:52,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-19 08:23:52,819 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:52,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:52,820 INFO L85 PathProgramCache]: Analyzing trace with hash 406121391, now seen corresponding path program 1 times [2022-11-19 08:23:52,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:52,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517919287] [2022-11-19 08:23:52,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:52,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:53,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:53,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517919287] [2022-11-19 08:23:53,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517919287] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:53,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:53,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-19 08:23:53,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718532929] [2022-11-19 08:23:53,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:53,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:23:53,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:53,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:23:53,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-19 08:23:53,024 INFO L87 Difference]: Start difference. First operand 336 states and 467 transitions. Second operand has 4 states, 3 states have (on average 6.666666666666667) internal successors, (20), 4 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:53,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:53,405 INFO L93 Difference]: Finished difference Result 465 states and 580 transitions. [2022-11-19 08:23:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:53,406 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-11-19 08:23:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:53,407 INFO L225 Difference]: With dead ends: 465 [2022-11-19 08:23:53,407 INFO L226 Difference]: Without dead ends: 465 [2022-11-19 08:23:53,408 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 [2022-11-19 08:23:53,408 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 284 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:53,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 258 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:23:53,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-11-19 08:23:53,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 336. [2022-11-19 08:23:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 270 states have (on average 1.6333333333333333) internal successors, (441), 319 states have internal predecessors, (441), 12 states have call successors, (12), 6 states have call predecessors, (12), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-19 08:23:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 465 transitions. [2022-11-19 08:23:53,416 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 465 transitions. Word has length 22 [2022-11-19 08:23:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:53,417 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 465 transitions. [2022-11-19 08:23:53,417 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 465 transitions. [2022-11-19 08:23:53,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-19 08:23:53,417 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:53,417 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:53,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-19 08:23:53,418 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr46ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:53,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1705876354, now seen corresponding path program 1 times [2022-11-19 08:23:53,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:53,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350570237] [2022-11-19 08:23:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:53,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:53,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:53,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350570237] [2022-11-19 08:23:53,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350570237] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:53,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:53,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:23:53,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353702703] [2022-11-19 08:23:53,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:53,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:23:53,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:53,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:23:53,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:23:53,631 INFO L87 Difference]: Start difference. First operand 336 states and 465 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:54,299 INFO L93 Difference]: Finished difference Result 606 states and 804 transitions. [2022-11-19 08:23:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-19 08:23:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-11-19 08:23:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:54,302 INFO L225 Difference]: With dead ends: 606 [2022-11-19 08:23:54,302 INFO L226 Difference]: Without dead ends: 606 [2022-11-19 08:23:54,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:23:54,303 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 304 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:54,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 555 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-19 08:23:54,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-11-19 08:23:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 366. [2022-11-19 08:23:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 297 states have (on average 1.612794612794613) internal successors, (479), 347 states have internal predecessors, (479), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 08:23:54,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 507 transitions. [2022-11-19 08:23:54,314 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 507 transitions. Word has length 24 [2022-11-19 08:23:54,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:54,314 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 507 transitions. [2022-11-19 08:23:54,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 507 transitions. [2022-11-19 08:23:54,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-19 08:23:54,315 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:54,315 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:54,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-11-19 08:23:54,316 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr47ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:54,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1342559158, now seen corresponding path program 1 times [2022-11-19 08:23:54,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:54,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730217641] [2022-11-19 08:23:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:54,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:54,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:54,522 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:54,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730217641] [2022-11-19 08:23:54,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730217641] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:54,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:54,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:23:54,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853706545] [2022-11-19 08:23:54,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:54,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:23:54,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:23:54,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:23:54,527 INFO L87 Difference]: Start difference. First operand 366 states and 507 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:54,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:54,853 INFO L93 Difference]: Finished difference Result 408 states and 527 transitions. [2022-11-19 08:23:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:23:54,855 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-11-19 08:23:54,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:54,857 INFO L225 Difference]: With dead ends: 408 [2022-11-19 08:23:54,857 INFO L226 Difference]: Without dead ends: 408 [2022-11-19 08:23:54,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:23:54,858 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 249 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:54,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 326 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:54,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-11-19 08:23:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 366. [2022-11-19 08:23:54,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 297 states have (on average 1.5993265993265993) internal successors, (475), 347 states have internal predecessors, (475), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 08:23:54,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 503 transitions. [2022-11-19 08:23:54,869 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 503 transitions. Word has length 25 [2022-11-19 08:23:54,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:54,870 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 503 transitions. [2022-11-19 08:23:54,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:23:54,870 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 503 transitions. [2022-11-19 08:23:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:23:54,870 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:54,871 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:54,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-19 08:23:54,871 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash 944588247, now seen corresponding path program 1 times [2022-11-19 08:23:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:54,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909313410] [2022-11-19 08:23:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:54,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:23:55,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:55,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909313410] [2022-11-19 08:23:55,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909313410] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:23:55,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:23:55,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:23:55,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581495411] [2022-11-19 08:23:55,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:23:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:23:55,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:23:55,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:23:55,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:23:55,107 INFO L87 Difference]: Start difference. First operand 366 states and 503 transitions. Second operand has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:23:55,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:23:55,407 INFO L93 Difference]: Finished difference Result 438 states and 566 transitions. [2022-11-19 08:23:55,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:23:55,408 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-11-19 08:23:55,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:23:55,433 INFO L225 Difference]: With dead ends: 438 [2022-11-19 08:23:55,433 INFO L226 Difference]: Without dead ends: 438 [2022-11-19 08:23:55,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:23:55,434 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 326 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:23:55,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 233 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:23:55,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-11-19 08:23:55,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 363. [2022-11-19 08:23:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 297 states have (on average 1.5824915824915824) internal successors, (470), 344 states have internal predecessors, (470), 14 states have call successors, (14), 7 states have call predecessors, (14), 7 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-19 08:23:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 498 transitions. [2022-11-19 08:23:55,446 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 498 transitions. Word has length 33 [2022-11-19 08:23:55,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:23:55,446 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 498 transitions. [2022-11-19 08:23:55,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.6) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:23:55,447 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 498 transitions. [2022-11-19 08:23:55,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 08:23:55,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:23:55,448 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:23:55,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-19 08:23:55,448 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:23:55,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:23:55,448 INFO L85 PathProgramCache]: Analyzing trace with hash -145547822, now seen corresponding path program 1 times [2022-11-19 08:23:55,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:23:55,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381969930] [2022-11-19 08:23:55,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:55,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:23:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:23:55,560 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:23:55,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381969930] [2022-11-19 08:23:55,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381969930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:23:55,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354201739] [2022-11-19 08:23:55,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:23:55,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:23:55,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:23:55,564 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:23:55,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 08:23:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:23:55,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:23:55,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:23:55,958 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:23:55,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:23:56,018 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 08:23:56,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-11-19 08:23:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:23:56,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354201739] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:23:56,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48084144] [2022-11-19 08:23:56,088 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 08:23:56,088 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:23:56,092 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:23:56,097 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:23:56,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:23:57,285 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 54 for LOIs [2022-11-19 08:23:57,290 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:24:00,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [48084144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:24:00,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:24:00,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [6, 5, 5] total 23 [2022-11-19 08:24:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901886104] [2022-11-19 08:24:00,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:24:00,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:24:00,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:24:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:24:00,005 INFO L87 Difference]: Start difference. First operand 363 states and 498 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:24:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:24:00,662 INFO L93 Difference]: Finished difference Result 390 states and 529 transitions. [2022-11-19 08:24:00,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:24:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-11-19 08:24:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:24:00,664 INFO L225 Difference]: With dead ends: 390 [2022-11-19 08:24:00,664 INFO L226 Difference]: Without dead ends: 390 [2022-11-19 08:24:00,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2022-11-19 08:24:00,665 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 61 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:24:00,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 193 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:24:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-11-19 08:24:00,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 376. [2022-11-19 08:24:00,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 309 states have (on average 1.5663430420711975) internal successors, (484), 356 states have internal predecessors, (484), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 08:24:00,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 514 transitions. [2022-11-19 08:24:00,674 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 514 transitions. Word has length 34 [2022-11-19 08:24:00,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:24:00,675 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 514 transitions. [2022-11-19 08:24:00,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 10 states have internal predecessors, (26), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:24:00,675 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 514 transitions. [2022-11-19 08:24:00,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-19 08:24:00,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:24:00,676 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:24:00,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-19 08:24:00,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:24:00,881 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr60REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:24:00,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:24:00,882 INFO L85 PathProgramCache]: Analyzing trace with hash 846352201, now seen corresponding path program 1 times [2022-11-19 08:24:00,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:24:00,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128795681] [2022-11-19 08:24:00,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:00,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:24:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:01,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:24:01,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128795681] [2022-11-19 08:24:01,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128795681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:24:01,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:24:01,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-19 08:24:01,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182992921] [2022-11-19 08:24:01,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:24:01,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-19 08:24:01,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:01,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-19 08:24:01,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-19 08:24:01,179 INFO L87 Difference]: Start difference. First operand 376 states and 514 transitions. Second operand has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:24:01,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:24:01,474 INFO L93 Difference]: Finished difference Result 399 states and 514 transitions. [2022-11-19 08:24:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:24:01,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-11-19 08:24:01,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:24:01,476 INFO L225 Difference]: With dead ends: 399 [2022-11-19 08:24:01,476 INFO L226 Difference]: Without dead ends: 399 [2022-11-19 08:24:01,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-11-19 08:24:01,477 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 230 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:24:01,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 269 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:24:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2022-11-19 08:24:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 375. [2022-11-19 08:24:01,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 309 states have (on average 1.5598705501618122) internal successors, (482), 355 states have internal predecessors, (482), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 08:24:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 512 transitions. [2022-11-19 08:24:01,487 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 512 transitions. Word has length 33 [2022-11-19 08:24:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:24:01,488 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 512 transitions. [2022-11-19 08:24:01,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.2) internal successors, (31), 6 states have internal predecessors, (31), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:24:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 512 transitions. [2022-11-19 08:24:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-19 08:24:01,488 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:24:01,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:24:01,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-19 08:24:01,489 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:24:01,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:24:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash -219271225, now seen corresponding path program 1 times [2022-11-19 08:24:01,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:24:01,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189703615] [2022-11-19 08:24:01,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:01,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:24:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:24:02,566 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:24:02,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189703615] [2022-11-19 08:24:02,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189703615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:24:02,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807792845] [2022-11-19 08:24:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:02,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:24:02,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:24:02,572 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:24:02,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 08:24:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:02,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-19 08:24:02,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:24:02,867 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:24:02,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 08:24:02,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:24:03,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:24:03,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:03,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:24:03,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:03,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:24:03,128 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 18 treesize of output 20 [2022-11-19 08:24:03,134 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 18 treesize of output 20 [2022-11-19 08:24:03,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 [2022-11-19 08:24:03,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 [2022-11-19 08:24:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:03,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:24:03,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807792845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:24:03,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:24:03,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [11] total 20 [2022-11-19 08:24:03,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313786876] [2022-11-19 08:24:03,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:24:03,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:24:03,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:03,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:24:03,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-11-19 08:24:03,223 INFO L87 Difference]: Start difference. First operand 375 states and 512 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:24:04,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:24:04,224 INFO L93 Difference]: Finished difference Result 581 states and 711 transitions. [2022-11-19 08:24:04,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-19 08:24:04,225 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-11-19 08:24:04,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:24:04,227 INFO L225 Difference]: With dead ends: 581 [2022-11-19 08:24:04,227 INFO L226 Difference]: Without dead ends: 581 [2022-11-19 08:24:04,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-11-19 08:24:04,228 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 420 mSDsluCounter, 974 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:24:04,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1114 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:24:04,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-11-19 08:24:04,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 378. [2022-11-19 08:24:04,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 312 states have (on average 1.5544871794871795) internal successors, (485), 358 states have internal predecessors, (485), 15 states have call successors, (15), 7 states have call predecessors, (15), 7 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-19 08:24:04,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 515 transitions. [2022-11-19 08:24:04,237 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 515 transitions. Word has length 34 [2022-11-19 08:24:04,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:24:04,238 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 515 transitions. [2022-11-19 08:24:04,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:24:04,238 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 515 transitions. [2022-11-19 08:24:04,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 08:24:04,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:24:04,239 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:24:04,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-19 08:24:04,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:24:04,445 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:24:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:24:04,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1144478554, now seen corresponding path program 1 times [2022-11-19 08:24:04,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:24:04,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803412830] [2022-11-19 08:24:04,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:04,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:24:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:24:05,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:24:05,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803412830] [2022-11-19 08:24:05,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803412830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:24:05,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577510406] [2022-11-19 08:24:05,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:05,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:24:05,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:24:05,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:24:05,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 08:24:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:06,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-19 08:24:06,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:24:06,203 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 [2022-11-19 08:24:06,419 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 [2022-11-19 08:24:06,592 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-11-19 08:24:06,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2022-11-19 08:24:06,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2022-11-19 08:24:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:06,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:24:06,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577510406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:24:06,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033730249] [2022-11-19 08:24:06,813 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2022-11-19 08:24:06,813 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:24:06,813 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:24:06,813 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:24:06,813 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:24:06,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:06,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:06,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:06,960 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 22 treesize of output 30 [2022-11-19 08:24:07,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-19 08:24:07,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,202 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-19 08:24:07,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-19 08:24:07,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,327 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 43 treesize of output 48 [2022-11-19 08:24:07,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,357 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 50 treesize of output 51 [2022-11-19 08:24:07,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-19 08:24:07,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,464 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 58 treesize of output 51 [2022-11-19 08:24:07,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,497 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 58 treesize of output 51 [2022-11-19 08:24:07,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:24:07,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 08:24:07,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,674 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-19 08:24:07,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-19 08:24:07,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-19 08:24:07,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:24:07,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:07,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:07,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:24:08,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:08,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:08,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:08,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:24:08,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-19 08:24:08,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:08,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:08,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:08,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:24:08,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:08,709 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 22 treesize of output 30 [2022-11-19 08:24:08,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:09,006 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:24:09,007 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:24:09,043 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:24:09,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:24:09,179 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 [2022-11-19 08:24:09,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:09,205 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 [2022-11-19 08:24:09,312 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 08:24:09,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-11-19 08:24:09,332 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:24:09,369 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 08:24:09,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-11-19 08:24:09,496 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-19 08:24:09,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:24:09,559 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-19 08:24:09,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-11-19 08:24:09,609 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-19 08:24:09,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:24:09,766 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 54 for LOIs [2022-11-19 08:24:09,769 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:24:18,259 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23456#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (= |~#list~0.offset| 0) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (= |ULTIMATE.start_main_~y~1#1| 0) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (= 3 |~#list~0.base|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (not (= (select |#valid| |ULTIMATE.start_create_item_#t~mem7#1.base|) 1)) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |ULTIMATE.start_create_item_~h~0#1| 2) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (= |ULTIMATE.start_create_item_~y~0#1| 1) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (= |ULTIMATE.start_main_~z~0#1| 0) |ULTIMATE.start_create_item_#t~short10#1| (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (= |#NULL.base| 0) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-19 08:24:18,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:24:18,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:24:18,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 20 [2022-11-19 08:24:18,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027404609] [2022-11-19 08:24:18,260 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:24:18,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-19 08:24:18,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:18,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-19 08:24:18,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2022-11-19 08:24:18,262 INFO L87 Difference]: Start difference. First operand 378 states and 515 transitions. Second operand has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:24:20,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:24:20,749 INFO L93 Difference]: Finished difference Result 632 states and 820 transitions. [2022-11-19 08:24:20,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-19 08:24:20,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2022-11-19 08:24:20,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:24:20,752 INFO L225 Difference]: With dead ends: 632 [2022-11-19 08:24:20,752 INFO L226 Difference]: Without dead ends: 632 [2022-11-19 08:24:20,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=479, Invalid=3181, Unknown=0, NotChecked=0, Total=3660 [2022-11-19 08:24:20,754 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 741 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 1783 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 744 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:24:20,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [744 Valid, 1321 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1783 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-19 08:24:20,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-11-19 08:24:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 445. [2022-11-19 08:24:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 373 states have (on average 1.522788203753351) internal successors, (568), 419 states have internal predecessors, (568), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 16 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-19 08:24:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 606 transitions. [2022-11-19 08:24:20,765 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 606 transitions. Word has length 35 [2022-11-19 08:24:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:24:20,765 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 606 transitions. [2022-11-19 08:24:20,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:24:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 606 transitions. [2022-11-19 08:24:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-19 08:24:20,766 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:24:20,766 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:24:20,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-19 08:24:20,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-11-19 08:24:20,972 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:24:20,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:24:20,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1535040592, now seen corresponding path program 1 times [2022-11-19 08:24:20,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:24:20,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603214073] [2022-11-19 08:24:20,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:20,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:24:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:24:22,561 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:24:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603214073] [2022-11-19 08:24:22,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603214073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:24:22,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126991712] [2022-11-19 08:24:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:22,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:24:22,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:24:22,563 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:24:22,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 08:24:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:22,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 93 conjunts are in the unsatisfiable core [2022-11-19 08:24:22,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:24:22,825 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:24:23,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:24:23,165 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 [2022-11-19 08:24:23,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:23,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:23,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:23,382 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 65 treesize of output 40 [2022-11-19 08:24:23,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:23,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-19 08:24:23,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:23,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-19 08:24:23,691 INFO L321 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2022-11-19 08:24:23,692 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 1 case distinctions, treesize of input 17 treesize of output 17 [2022-11-19 08:24:23,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-19 08:24:23,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2022-11-19 08:24:23,806 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:23,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:24:26,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126991712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:24:26,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789637987] [2022-11-19 08:24:26,340 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-19 08:24:26,340 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:24:26,340 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:24:26,340 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:24:26,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:24:26,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,494 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 22 treesize of output 30 [2022-11-19 08:24:26,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:26,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-19 08:24:26,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-19 08:24:26,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:26,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:26,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,736 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-19 08:24:26,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,825 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 50 treesize of output 51 [2022-11-19 08:24:26,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-19 08:24:26,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,894 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 43 treesize of output 48 [2022-11-19 08:24:26,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:26,981 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 58 treesize of output 51 [2022-11-19 08:24:27,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:24:27,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,032 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 58 treesize of output 51 [2022-11-19 08:24:27,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-19 08:24:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 08:24:27,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-19 08:24:27,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-19 08:24:27,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:24:27,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:24:27,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-19 08:24:27,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:24:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:24:27,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:27,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,981 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:27,983 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-11-19 08:24:28,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:28,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:28,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:28,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:28,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:28,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-11-19 08:24:28,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:24:28,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:24:28,330 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:24:28,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-19 08:24:28,362 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:24:28,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-11-19 08:24:28,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:28,456 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:28,510 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-19 08:24:28,510 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 3 case distinctions, treesize of input 41 treesize of output 39 [2022-11-19 08:24:28,559 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-19 08:24:28,559 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 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-19 08:24:28,664 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-19 08:24:28,664 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 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-19 08:24:28,749 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-19 08:24:28,750 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 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-19 08:24:28,783 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 [2022-11-19 08:24:28,788 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-19 08:24:28,796 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 7 [2022-11-19 08:24:29,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:24:29,526 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 [2022-11-19 08:24:29,542 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 [2022-11-19 08:24:30,147 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 [2022-11-19 08:24:30,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:24:30,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:30,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:30,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:30,282 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 38 treesize of output 29 [2022-11-19 08:24:30,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:30,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:30,320 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:30,321 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 38 treesize of output 29 [2022-11-19 08:24:30,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:30,663 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-11-19 08:24:30,700 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:24:30,700 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:24:31,029 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:31,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 43 [2022-11-19 08:24:31,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 49 [2022-11-19 08:24:31,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:31,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,270 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 49 treesize of output 54 [2022-11-19 08:24:31,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,297 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 68 treesize of output 57 [2022-11-19 08:24:31,358 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 [2022-11-19 08:24:31,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,415 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 83 treesize of output 60 [2022-11-19 08:24:31,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,454 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 64 treesize of output 57 [2022-11-19 08:24:31,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2022-11-19 08:24:31,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 60 [2022-11-19 08:24:31,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-11-19 08:24:31,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:31,852 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 [2022-11-19 08:24:31,870 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 [2022-11-19 08:24:31,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,948 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 38 treesize of output 29 [2022-11-19 08:24:31,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:24:31,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:24:31,969 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 38 treesize of output 29 [2022-11-19 08:24:31,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:33,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:24:33,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:24:33,507 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:24:33,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:24:33,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:33,553 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:24:33,553 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:24:33,665 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:24:33,679 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 [2022-11-19 08:24:33,692 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 [2022-11-19 08:24:33,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:24:33,779 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 08:24:33,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-11-19 08:24:33,821 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 08:24:33,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-11-19 08:24:33,947 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-19 08:24:33,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-11-19 08:24:34,010 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-19 08:24:34,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:24:34,068 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-19 08:24:34,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:24:34,519 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 104 for LOIs [2022-11-19 08:24:34,550 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:24:48,102 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24743#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= |~#list~0.base| 3) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= (+ |ULTIMATE.start_create_item_~cursor#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_~cursor#1.base|)) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (= (select |#valid| |ULTIMATE.start_create_item_~cursor#1.base|) 1) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~y~1#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= |ULTIMATE.start_main_~y~1#1| 4) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (<= |#NULL.offset| 0) (= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (= |ULTIMATE.start_create_item_~h~0#1| 2) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.offset|) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_create_item_~y~0#1| 1) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) |ULTIMATE.start_create_item_#t~short10#1| (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (or (not (<= 0 (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset|))) (not (<= (+ (* 4 |ULTIMATE.start_create_item_~link_field~0#1|) |ULTIMATE.start_create_item_#t~mem7#1.offset| 4) (select |#length| |ULTIMATE.start_create_item_#t~mem7#1.base|)))) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_create_item_~cursor#1.base|) |ULTIMATE.start_create_item_~cursor#1.offset|) |ULTIMATE.start_create_item_#t~mem7#1.base|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-19 08:24:48,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:24:48,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-19 08:24:48,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 26 [2022-11-19 08:24:48,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129394967] [2022-11-19 08:24:48,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-19 08:24:48,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-19 08:24:48,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:48,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-19 08:24:48,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2811, Unknown=0, NotChecked=0, Total=3080 [2022-11-19 08:24:48,106 INFO L87 Difference]: Start difference. First operand 445 states and 606 transitions. Second operand has 27 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:24:54,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:24:54,729 INFO L93 Difference]: Finished difference Result 1170 states and 1442 transitions. [2022-11-19 08:24:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-19 08:24:54,730 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-19 08:24:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:24:54,732 INFO L225 Difference]: With dead ends: 1170 [2022-11-19 08:24:54,732 INFO L226 Difference]: Without dead ends: 1170 [2022-11-19 08:24:54,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=938, Invalid=7618, Unknown=0, NotChecked=0, Total=8556 [2022-11-19 08:24:54,734 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 3323 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 2585 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3324 SdHoareTripleChecker+Valid, 1760 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 2585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:24:54,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3324 Valid, 1760 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 2585 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-19 08:24:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2022-11-19 08:24:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 559. [2022-11-19 08:24:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 478 states have (on average 1.5397489539748954) internal successors, (736), 526 states have internal predecessors, (736), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (25), 20 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-19 08:24:54,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 786 transitions. [2022-11-19 08:24:54,752 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 786 transitions. Word has length 36 [2022-11-19 08:24:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:24:54,753 INFO L495 AbstractCegarLoop]: Abstraction has 559 states and 786 transitions. [2022-11-19 08:24:54,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:24:54,753 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 786 transitions. [2022-11-19 08:24:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:24:54,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:24:54,754 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:24:54,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 08:24:54,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-19 08:24:54,961 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr66ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:24:54,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:24:54,961 INFO L85 PathProgramCache]: Analyzing trace with hash -538450689, now seen corresponding path program 1 times [2022-11-19 08:24:54,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:24:54,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249635390] [2022-11-19 08:24:54,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:54,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:24:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:55,036 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:24:55,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249635390] [2022-11-19 08:24:55,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249635390] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:24:55,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866219267] [2022-11-19 08:24:55,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:55,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:24:55,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:24:55,038 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:24:55,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 08:24:55,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:55,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 08:24:55,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:24:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:55,273 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 08:24:55,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866219267] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:24:55,273 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 08:24:55,273 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-11-19 08:24:55,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388811647] [2022-11-19 08:24:55,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:24:55,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-19 08:24:55,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:55,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-19 08:24:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:24:55,275 INFO L87 Difference]: Start difference. First operand 559 states and 786 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:24:55,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:24:55,378 INFO L93 Difference]: Finished difference Result 890 states and 1260 transitions. [2022-11-19 08:24:55,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-19 08:24:55,378 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-19 08:24:55,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:24:55,381 INFO L225 Difference]: With dead ends: 890 [2022-11-19 08:24:55,381 INFO L226 Difference]: Without dead ends: 890 [2022-11-19 08:24:55,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:24:55,382 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 237 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:24:55,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 260 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:24:55,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-11-19 08:24:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 606. [2022-11-19 08:24:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 525 states have (on average 1.5276190476190477) internal successors, (802), 573 states have internal predecessors, (802), 25 states have call successors, (25), 12 states have call predecessors, (25), 12 states have return successors, (25), 20 states have call predecessors, (25), 25 states have call successors, (25) [2022-11-19 08:24:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 852 transitions. [2022-11-19 08:24:55,416 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 852 transitions. Word has length 37 [2022-11-19 08:24:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:24:55,417 INFO L495 AbstractCegarLoop]: Abstraction has 606 states and 852 transitions. [2022-11-19 08:24:55,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:24:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 852 transitions. [2022-11-19 08:24:55,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:24:55,418 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:24:55,418 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:24:55,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 08:24:55,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:24:55,624 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr61REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:24:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:24:55,624 INFO L85 PathProgramCache]: Analyzing trace with hash -538452439, now seen corresponding path program 1 times [2022-11-19 08:24:55,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:24:55,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859711182] [2022-11-19 08:24:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:55,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:24:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:56,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:24:56,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859711182] [2022-11-19 08:24:56,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859711182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:24:56,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:24:56,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-11-19 08:24:56,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110329098] [2022-11-19 08:24:56,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:24:56,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-19 08:24:56,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-19 08:24:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-11-19 08:24:56,413 INFO L87 Difference]: Start difference. First operand 606 states and 852 transitions. Second operand has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:24:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:24:57,528 INFO L93 Difference]: Finished difference Result 1006 states and 1346 transitions. [2022-11-19 08:24:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:24:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-19 08:24:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:24:57,532 INFO L225 Difference]: With dead ends: 1006 [2022-11-19 08:24:57,532 INFO L226 Difference]: Without dead ends: 1006 [2022-11-19 08:24:57,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:24:57,533 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 1019 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1021 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-19 08:24:57,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1021 Valid, 669 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-19 08:24:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-11-19 08:24:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 720. [2022-11-19 08:24:57,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 628 states have (on average 1.5031847133757963) internal successors, (944), 679 states have internal predecessors, (944), 33 states have call successors, (33), 16 states have call predecessors, (33), 16 states have return successors, (33), 24 states have call predecessors, (33), 33 states have call successors, (33) [2022-11-19 08:24:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1010 transitions. [2022-11-19 08:24:57,567 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1010 transitions. Word has length 37 [2022-11-19 08:24:57,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:24:57,567 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 1010 transitions. [2022-11-19 08:24:57,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.5) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:24:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1010 transitions. [2022-11-19 08:24:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-19 08:24:57,568 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:24:57,568 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:24:57,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-11-19 08:24:57,569 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr62REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:24:57,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:24:57,570 INFO L85 PathProgramCache]: Analyzing trace with hash -538452438, now seen corresponding path program 1 times [2022-11-19 08:24:57,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:24:57,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063658041] [2022-11-19 08:24:57,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:24:57,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:24:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:24:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:24:59,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:24:59,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063658041] [2022-11-19 08:24:59,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063658041] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:24:59,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:24:59,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-19 08:24:59,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119732733] [2022-11-19 08:24:59,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:24:59,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-19 08:24:59,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:24:59,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-19 08:24:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-11-19 08:24:59,259 INFO L87 Difference]: Start difference. First operand 720 states and 1010 transitions. Second operand has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:01,138 INFO L93 Difference]: Finished difference Result 1084 states and 1430 transitions. [2022-11-19 08:25:01,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-19 08:25:01,138 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-11-19 08:25:01,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:01,140 INFO L225 Difference]: With dead ends: 1084 [2022-11-19 08:25:01,141 INFO L226 Difference]: Without dead ends: 1084 [2022-11-19 08:25:01,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=180, Invalid=576, Unknown=0, NotChecked=0, Total=756 [2022-11-19 08:25:01,142 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 1351 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:01,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1353 Valid, 1027 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-19 08:25:01,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-11-19 08:25:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 774. [2022-11-19 08:25:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 679 states have (on average 1.5139911634756995) internal successors, (1028), 731 states have internal predecessors, (1028), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-19 08:25:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 1098 transitions. [2022-11-19 08:25:01,163 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 1098 transitions. Word has length 37 [2022-11-19 08:25:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:01,164 INFO L495 AbstractCegarLoop]: Abstraction has 774 states and 1098 transitions. [2022-11-19 08:25:01,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:01,164 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 1098 transitions. [2022-11-19 08:25:01,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-19 08:25:01,165 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:01,165 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:01,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-11-19 08:25:01,165 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr34ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:01,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:01,166 INFO L85 PathProgramCache]: Analyzing trace with hash -2126650194, now seen corresponding path program 1 times [2022-11-19 08:25:01,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:01,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504024797] [2022-11-19 08:25:01,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:01,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:01,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-19 08:25:01,306 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:01,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504024797] [2022-11-19 08:25:01,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504024797] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:01,306 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:01,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:25:01,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319123524] [2022-11-19 08:25:01,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:01,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:25:01,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:01,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:25:01,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:25:01,308 INFO L87 Difference]: Start difference. First operand 774 states and 1098 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:25:01,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:01,418 INFO L93 Difference]: Finished difference Result 957 states and 1327 transitions. [2022-11-19 08:25:01,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-19 08:25:01,419 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2022-11-19 08:25:01,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:01,423 INFO L225 Difference]: With dead ends: 957 [2022-11-19 08:25:01,423 INFO L226 Difference]: Without dead ends: 957 [2022-11-19 08:25:01,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:25:01,424 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 332 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:01,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 204 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 08:25:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-11-19 08:25:01,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 773. [2022-11-19 08:25:01,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 773 states, 679 states have (on average 1.5051546391752577) internal successors, (1022), 730 states have internal predecessors, (1022), 35 states have call successors, (35), 17 states have call predecessors, (35), 17 states have return successors, (35), 25 states have call predecessors, (35), 35 states have call successors, (35) [2022-11-19 08:25:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 773 states to 773 states and 1092 transitions. [2022-11-19 08:25:01,467 INFO L78 Accepts]: Start accepts. Automaton has 773 states and 1092 transitions. Word has length 38 [2022-11-19 08:25:01,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:01,467 INFO L495 AbstractCegarLoop]: Abstraction has 773 states and 1092 transitions. [2022-11-19 08:25:01,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-19 08:25:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 773 states and 1092 transitions. [2022-11-19 08:25:01,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:25:01,471 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:01,471 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:01,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-11-19 08:25:01,471 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr35ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:01,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:01,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1501646345, now seen corresponding path program 1 times [2022-11-19 08:25:01,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:01,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549187333] [2022-11-19 08:25:01,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:01,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:02,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:25:02,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:02,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549187333] [2022-11-19 08:25:02,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549187333] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:02,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:02,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-19 08:25:02,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420090384] [2022-11-19 08:25:02,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:02,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:25:02,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:02,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:25:02,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-19 08:25:02,406 INFO L87 Difference]: Start difference. First operand 773 states and 1092 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:25:04,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:04,443 INFO L93 Difference]: Finished difference Result 1678 states and 2264 transitions. [2022-11-19 08:25:04,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 08:25:04,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-11-19 08:25:04,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:04,449 INFO L225 Difference]: With dead ends: 1678 [2022-11-19 08:25:04,450 INFO L226 Difference]: Without dead ends: 1674 [2022-11-19 08:25:04,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2022-11-19 08:25:04,451 INFO L413 NwaCegarLoop]: 226 mSDtfsCounter, 1296 mSDsluCounter, 1383 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1296 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:04,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1296 Valid, 1609 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-19 08:25:04,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1674 states. [2022-11-19 08:25:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1674 to 799. [2022-11-19 08:25:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 702 states have (on average 1.5071225071225072) internal successors, (1058), 754 states have internal predecessors, (1058), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-19 08:25:04,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1132 transitions. [2022-11-19 08:25:04,476 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1132 transitions. Word has length 39 [2022-11-19 08:25:04,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:04,476 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1132 transitions. [2022-11-19 08:25:04,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:25:04,476 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1132 transitions. [2022-11-19 08:25:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:25:04,477 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:04,477 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:04,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-11-19 08:25:04,478 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1869874587, now seen corresponding path program 1 times [2022-11-19 08:25:04,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:04,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286618936] [2022-11-19 08:25:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:04,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:04,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:25:04,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:04,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286618936] [2022-11-19 08:25:04,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286618936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:04,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:04,572 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:25:04,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812979240] [2022-11-19 08:25:04,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:04,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:25:04,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:04,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:25:04,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:25:04,573 INFO L87 Difference]: Start difference. First operand 799 states and 1132 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:04,870 INFO L93 Difference]: Finished difference Result 895 states and 1261 transitions. [2022-11-19 08:25:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:25:04,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-11-19 08:25:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:04,873 INFO L225 Difference]: With dead ends: 895 [2022-11-19 08:25:04,873 INFO L226 Difference]: Without dead ends: 895 [2022-11-19 08:25:04,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:25:04,874 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 113 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:04,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 346 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:25:04,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2022-11-19 08:25:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 799. [2022-11-19 08:25:04,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 702 states have (on average 1.5042735042735043) internal successors, (1056), 754 states have internal predecessors, (1056), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-19 08:25:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1130 transitions. [2022-11-19 08:25:04,899 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1130 transitions. Word has length 39 [2022-11-19 08:25:04,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:04,899 INFO L495 AbstractCegarLoop]: Abstraction has 799 states and 1130 transitions. [2022-11-19 08:25:04,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:04,899 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1130 transitions. [2022-11-19 08:25:04,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:25:04,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:04,901 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:04,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-11-19 08:25:04,902 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:04,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:04,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1869874586, now seen corresponding path program 1 times [2022-11-19 08:25:04,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:04,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494760679] [2022-11-19 08:25:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:04,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:04,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:25:05,060 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:05,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494760679] [2022-11-19 08:25:05,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494760679] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:05,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:05,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:25:05,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230871965] [2022-11-19 08:25:05,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:05,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:25:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:05,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:25:05,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:25:05,064 INFO L87 Difference]: Start difference. First operand 799 states and 1130 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:05,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:05,326 INFO L93 Difference]: Finished difference Result 819 states and 1114 transitions. [2022-11-19 08:25:05,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 08:25:05,326 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-11-19 08:25:05,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:05,332 INFO L225 Difference]: With dead ends: 819 [2022-11-19 08:25:05,333 INFO L226 Difference]: Without dead ends: 819 [2022-11-19 08:25:05,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:25:05,333 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 116 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:05,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 404 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 08:25:05,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2022-11-19 08:25:05,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 794. [2022-11-19 08:25:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 701 states have (on average 1.479315263908702) internal successors, (1037), 749 states have internal predecessors, (1037), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-19 08:25:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1111 transitions. [2022-11-19 08:25:05,351 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1111 transitions. Word has length 39 [2022-11-19 08:25:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:05,351 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1111 transitions. [2022-11-19 08:25:05,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 5 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1111 transitions. [2022-11-19 08:25:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-11-19 08:25:05,354 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:05,354 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:05,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-11-19 08:25:05,354 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr64ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:05,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2056685534, now seen corresponding path program 1 times [2022-11-19 08:25:05,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:05,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287189854] [2022-11-19 08:25:05,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:05,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:05,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:06,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:06,167 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:06,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287189854] [2022-11-19 08:25:06,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287189854] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:06,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:06,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-19 08:25:06,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671192266] [2022-11-19 08:25:06,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:06,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-19 08:25:06,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:06,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-19 08:25:06,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:25:06,169 INFO L87 Difference]: Start difference. First operand 794 states and 1111 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:07,268 INFO L93 Difference]: Finished difference Result 1013 states and 1333 transitions. [2022-11-19 08:25:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-19 08:25:07,269 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-11-19 08:25:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:07,274 INFO L225 Difference]: With dead ends: 1013 [2022-11-19 08:25:07,274 INFO L226 Difference]: Without dead ends: 1013 [2022-11-19 08:25:07,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2022-11-19 08:25:07,275 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 912 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:07,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 684 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-19 08:25:07,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-11-19 08:25:07,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 800. [2022-11-19 08:25:07,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 707 states have (on average 1.4823196605374822) internal successors, (1048), 755 states have internal predecessors, (1048), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-19 08:25:07,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 1122 transitions. [2022-11-19 08:25:07,294 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 1122 transitions. Word has length 39 [2022-11-19 08:25:07,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:07,294 INFO L495 AbstractCegarLoop]: Abstraction has 800 states and 1122 transitions. [2022-11-19 08:25:07,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:07,295 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 1122 transitions. [2022-11-19 08:25:07,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-19 08:25:07,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:07,296 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:07,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-11-19 08:25:07,296 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:07,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:07,296 INFO L85 PathProgramCache]: Analyzing trace with hash 693976117, now seen corresponding path program 1 times [2022-11-19 08:25:07,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:07,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200238183] [2022-11-19 08:25:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:07,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:25:07,646 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:07,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200238183] [2022-11-19 08:25:07,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200238183] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:07,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:07,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-19 08:25:07,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37627761] [2022-11-19 08:25:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:07,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-19 08:25:07,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:07,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-19 08:25:07,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-19 08:25:07,649 INFO L87 Difference]: Start difference. First operand 800 states and 1122 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:25:08,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:08,091 INFO L93 Difference]: Finished difference Result 884 states and 1195 transitions. [2022-11-19 08:25:08,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:25:08,092 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-11-19 08:25:08,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:08,095 INFO L225 Difference]: With dead ends: 884 [2022-11-19 08:25:08,095 INFO L226 Difference]: Without dead ends: 884 [2022-11-19 08:25:08,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-11-19 08:25:08,096 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 380 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:08,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 305 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-19 08:25:08,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-11-19 08:25:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 798. [2022-11-19 08:25:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 798 states, 707 states have (on average 1.4596888260254597) internal successors, (1032), 753 states have internal predecessors, (1032), 37 states have call successors, (37), 18 states have call predecessors, (37), 18 states have return successors, (37), 26 states have call predecessors, (37), 37 states have call successors, (37) [2022-11-19 08:25:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 798 states to 798 states and 1106 transitions. [2022-11-19 08:25:08,115 INFO L78 Accepts]: Start accepts. Automaton has 798 states and 1106 transitions. Word has length 40 [2022-11-19 08:25:08,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:08,117 INFO L495 AbstractCegarLoop]: Abstraction has 798 states and 1106 transitions. [2022-11-19 08:25:08,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-19 08:25:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 798 states and 1106 transitions. [2022-11-19 08:25:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 08:25:08,118 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:08,118 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-11-19 08:25:08,119 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash 46045733, now seen corresponding path program 1 times [2022-11-19 08:25:08,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:08,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392187506] [2022-11-19 08:25:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:08,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:08,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:25:08,254 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:08,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392187506] [2022-11-19 08:25:08,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392187506] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:08,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292347287] [2022-11-19 08:25:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:08,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:08,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:08,259 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:08,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 08:25:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:08,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-19 08:25:08,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:08,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-19 08:25:08,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:08,693 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-19 08:25:08,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-11-19 08:25:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:25:08,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292347287] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:08,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1238438839] [2022-11-19 08:25:08,721 INFO L159 IcfgInterpreter]: Started Sifa with 29 locations of interest [2022-11-19 08:25:08,722 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:08,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:08,722 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:08,723 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:09,440 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-19 08:25:09,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-19 08:25:10,079 INFO L321 Elim1Store]: treesize reduction 35, result has 32.7 percent of original size [2022-11-19 08:25:10,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 49 [2022-11-19 08:25:10,472 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 13 for LOIs [2022-11-19 08:25:10,474 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:17,296 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '43224#(and (= ~unnamed1~0~LIST_BEG |ULTIMATE.start_main_#t~ret35#1|) (= |ULTIMATE.start_main_~y~1#1| 0) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_remove_one_~from#1|) (<= |ULTIMATE.start_remove_one_#in~list#1.base| 3) (= |ULTIMATE.start_remove_one_#in~from#1| |ULTIMATE.start_main_#t~ret35#1|) (not (= (select |#valid| |ULTIMATE.start_is_empty_~list#1.base|) 1)) (<= 3 |ULTIMATE.start_is_empty_~list#1.base|) (= |ULTIMATE.start_remove_one_#in~list#1.base| |~#list~0.base|) (<= |ULTIMATE.start_is_empty_~list#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 3 |ULTIMATE.start_remove_one_#in~list#1.base|) (= |~#list~0.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |ULTIMATE.start_is_empty_~list#1.offset| |ULTIMATE.start_is_empty_#in~list#1.offset|) (<= |ULTIMATE.start_remove_one_~list#1.base| 3) (= |ULTIMATE.start_main_~z~0#1| 0) (<= 0 |ULTIMATE.start_remove_one_#in~list#1.offset|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_is_empty_~list#1.offset|) (= |ULTIMATE.start_is_empty_#in~list#1.base| |ULTIMATE.start_remove_one_~list#1.base|) (<= 3 |ULTIMATE.start_remove_one_~list#1.base|) (= |ULTIMATE.start_remove_one_~list#1.offset| |ULTIMATE.start_remove_one_#in~list#1.offset|) (<= |ULTIMATE.start_is_empty_~list#1.base| 3) (<= 0 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~length~0#1| 0) (<= |ULTIMATE.start_remove_one_~list#1.offset| 0) (= |#NULL.base| 0))' at error location [2022-11-19 08:25:17,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:17,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:17,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-11-19 08:25:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663315014] [2022-11-19 08:25:17,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:17,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-19 08:25:17,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-19 08:25:17,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2022-11-19 08:25:17,298 INFO L87 Difference]: Start difference. First operand 798 states and 1106 transitions. Second operand has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:25:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:18,243 INFO L93 Difference]: Finished difference Result 2463 states and 3302 transitions. [2022-11-19 08:25:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-19 08:25:18,243 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2022-11-19 08:25:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:18,251 INFO L225 Difference]: With dead ends: 2463 [2022-11-19 08:25:18,251 INFO L226 Difference]: Without dead ends: 2463 [2022-11-19 08:25:18,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=489, Invalid=1491, Unknown=0, NotChecked=0, Total=1980 [2022-11-19 08:25:18,253 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1881 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1883 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:18,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1883 Valid, 714 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 829 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 08:25:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2022-11-19 08:25:18,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 1021. [2022-11-19 08:25:18,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 912 states have (on average 1.3980263157894737) internal successors, (1275), 957 states have internal predecessors, (1275), 53 states have call successors, (53), 26 states have call predecessors, (53), 26 states have return successors, (53), 37 states have call predecessors, (53), 53 states have call successors, (53) [2022-11-19 08:25:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 1381 transitions. [2022-11-19 08:25:18,285 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 1381 transitions. Word has length 41 [2022-11-19 08:25:18,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:18,286 INFO L495 AbstractCegarLoop]: Abstraction has 1021 states and 1381 transitions. [2022-11-19 08:25:18,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.0) internal successors, (66), 12 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-19 08:25:18,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 1381 transitions. [2022-11-19 08:25:18,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 08:25:18,287 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:18,287 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:18,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-19 08:25:18,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:18,493 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:18,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:18,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1655938515, now seen corresponding path program 1 times [2022-11-19 08:25:18,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:18,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155396930] [2022-11-19 08:25:18,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:18,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:19,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:25:19,994 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:19,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155396930] [2022-11-19 08:25:19,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155396930] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:19,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528093772] [2022-11-19 08:25:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:19,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:19,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:19,996 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:20,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 08:25:20,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:20,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-19 08:25:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:20,488 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 [2022-11-19 08:25:20,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:20,580 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 31 treesize of output 30 [2022-11-19 08:25:21,159 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 26 treesize of output 18 [2022-11-19 08:25:21,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:21,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-11-19 08:25:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:21,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:25:21,341 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:21,341 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 42 treesize of output 46 [2022-11-19 08:25:21,781 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 246 treesize of output 230 [2022-11-19 08:25:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 08:25:22,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528093772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 08:25:22,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [676001684] [2022-11-19 08:25:22,110 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2022-11-19 08:25:22,110 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 08:25:22,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 08:25:22,111 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 08:25:22,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 08:25:22,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,283 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 22 treesize of output 30 [2022-11-19 08:25:22,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:22,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:22,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,422 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-19 08:25:22,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:22,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 37 [2022-11-19 08:25:22,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-19 08:25:22,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,551 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 43 treesize of output 48 [2022-11-19 08:25:22,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,587 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 43 treesize of output 48 [2022-11-19 08:25:22,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 21 [2022-11-19 08:25:22,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,671 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 58 treesize of output 51 [2022-11-19 08:25:22,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-11-19 08:25:22,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,763 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 58 treesize of output 51 [2022-11-19 08:25:22,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:22,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:22,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-19 08:25:22,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-11-19 08:25:22,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:22,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:22,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 51 [2022-11-19 08:25:22,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:22,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-19 08:25:23,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:25:23,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:25:23,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:25:23,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 51 [2022-11-19 08:25:23,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 33 [2022-11-19 08:25:23,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-11-19 08:25:23,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:23,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:23,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 36 [2022-11-19 08:25:23,766 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:25:23,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:25:23,976 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:25:23,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:25:23,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:24,030 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:25:24,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:25:24,122 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-19 08:25:24,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-19 08:25:24,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:24,188 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-19 08:25:24,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-19 08:25:24,305 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-19 08:25:24,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-19 08:25:24,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:25:24,416 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-19 08:25:24,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-19 08:25:24,429 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-19 08:25:24,431 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-19 08:25:24,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:25:25,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-19 08:25:25,186 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 [2022-11-19 08:25:25,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:25:25,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:25,536 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 [2022-11-19 08:25:25,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:25,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:25,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:25,628 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 38 treesize of output 29 [2022-11-19 08:25:25,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:25,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:25,657 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 38 treesize of output 29 [2022-11-19 08:25:26,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:26,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2022-11-19 08:25:26,089 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-19 08:25:26,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-19 08:25:26,496 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:25:26,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:25:26,536 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:25:26,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:25:26,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:26,646 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-19 08:25:26,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-19 08:25:26,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:26,704 INFO L321 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2022-11-19 08:25:26,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 36 [2022-11-19 08:25:26,809 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-19 08:25:26,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-19 08:25:26,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:25:26,939 INFO L321 Elim1Store]: treesize reduction 116, result has 31.0 percent of original size [2022-11-19 08:25:26,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 61 [2022-11-19 08:25:26,965 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-19 08:25:26,967 WARN L137 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2022-11-19 08:25:27,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2022-11-19 08:25:27,515 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 [2022-11-19 08:25:27,534 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 [2022-11-19 08:25:28,046 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 [2022-11-19 08:25:28,062 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 [2022-11-19 08:25:28,076 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:28,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:28,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:28,156 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 38 treesize of output 29 [2022-11-19 08:25:28,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:28,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:28,192 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 38 treesize of output 29 [2022-11-19 08:25:28,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:29,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-11-19 08:25:29,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-19 08:25:29,994 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:25:29,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:25:30,031 INFO L321 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-11-19 08:25:30,032 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-11-19 08:25:30,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:30,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2022-11-19 08:25:30,194 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 [2022-11-19 08:25:30,209 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 [2022-11-19 08:25:30,289 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 08:25:30,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-11-19 08:25:30,326 INFO L321 Elim1Store]: treesize reduction 25, result has 40.5 percent of original size [2022-11-19 08:25:30,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 21 [2022-11-19 08:25:30,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-19 08:25:30,457 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-19 08:25:30,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:25:30,519 INFO L321 Elim1Store]: treesize reduction 25, result has 47.9 percent of original size [2022-11-19 08:25:30,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 40 [2022-11-19 08:25:30,596 INFO L321 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2022-11-19 08:25:30,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2022-11-19 08:25:30,721 INFO L197 IcfgInterpreter]: Interpreting procedure rand_end_point with input of size 104 for LOIs [2022-11-19 08:25:30,749 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 08:25:46,496 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47034#(and (<= |ULTIMATE.start_create_item_#in~cursor#1.offset| 8589934588) (<= |~#list~0.base| 3) (<= 3 |ULTIMATE.start_create_item_#in~cursor#1.base|) (<= 3 |ULTIMATE.start_create_item_~cursor#1.base|) (<= |ULTIMATE.start_main_#t~ret30#1| 2147483647) (<= 0 |#NULL.base|) (<= |ULTIMATE.start_append_one_#in~to#1| 2147483647) (<= |ULTIMATE.start_create_item_#in~at#1| 2147483647) (<= 0 (+ |ULTIMATE.start_main_#t~ret30#1| 2147483648)) (<= |ULTIMATE.start_append_one_~to#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 0) (<= |ULTIMATE.start_append_one_~list#1.base| 3) (<= 0 |ULTIMATE.start_append_one_~cursor~0#1.offset|) (<= |ULTIMATE.start_append_one_#in~list#1.offset| 0) (<= 0 |ULTIMATE.start_append_one_~list#1.offset|) (<= |ULTIMATE.start_append_one_~list#1.offset| 0) (<= 3 |ULTIMATE.start_append_one_~cursor~0#1.base|) (<= |ULTIMATE.start_create_item_~cursor#1.base| 3) (<= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 |ULTIMATE.start_main_~y~1#1|) (<= 0 (+ 2147483648 |ULTIMATE.start_append_one_~to#1|)) (<= |ULTIMATE.start_main_~y~1#1| 4) (<= 0 |ULTIMATE.start_create_item_~cursor#1.offset|) (<= |ULTIMATE.start_append_one_~cursor~0#1.base| 3) (<= |#NULL.offset| 0) (or (not (= |ULTIMATE.start_create_item_~link~0#1.offset| 0)) (not (= |ULTIMATE.start_create_item_~link~0#1.base| 0))) (= |ULTIMATE.start_create_item_~h~0#1| 2) (<= |ULTIMATE.start_create_item_~at#1| 2147483647) (<= 0 |ULTIMATE.start_main_~length~0#1|) (<= 0 (+ |ULTIMATE.start_append_one_#in~to#1| 2147483648)) (<= 0 |ULTIMATE.start_append_one_#in~list#1.offset|) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_create_item_~y~0#1| 1) (<= 3 |ULTIMATE.start_append_one_~list#1.base|) (<= 0 |ULTIMATE.start_create_item_~item~0#1.offset|) (or (not (<= (+ |ULTIMATE.start_create_item_~link~0#1.offset| (* |ULTIMATE.start_create_item_~term_field~0#1| 4) 4) (select |#length| |ULTIMATE.start_create_item_~link~0#1.base|))) (not (<= 0 (+ |ULTIMATE.start_create_item_~link~0#1.offset| (* |ULTIMATE.start_create_item_~term_field~0#1| 4))))) (<= |#NULL.base| 0) (<= 0 (+ |ULTIMATE.start_create_item_~at#1| 2147483648)) (<= |ULTIMATE.start_append_one_~cursor~0#1.offset| 8589934588) (<= |ULTIMATE.start_create_item_#in~cursor#1.base| 3) (<= 0 |ULTIMATE.start_create_item_#in~cursor#1.offset|) (<= 0 (+ |ULTIMATE.start_create_item_#in~at#1| 2147483648)) (<= |ULTIMATE.start_create_item_~item~0#1.offset| 0) (<= 0 |~#list~0.offset|) (<= 3 |~#list~0.base|) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_create_item_~cursor#1.offset| 8589934588) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_append_one_#in~list#1.base| 3) (<= |~#list~0.offset| 0) (<= 0 |ULTIMATE.start_main_~z~0#1|) (<= 3 |ULTIMATE.start_append_one_#in~list#1.base|))' at error location [2022-11-19 08:25:46,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 08:25:46,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 08:25:46,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 37 [2022-11-19 08:25:46,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737280271] [2022-11-19 08:25:46,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 08:25:46,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-19 08:25:46,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-19 08:25:46,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=3505, Unknown=0, NotChecked=0, Total=3906 [2022-11-19 08:25:46,500 INFO L87 Difference]: Start difference. First operand 1021 states and 1381 transitions. Second operand has 38 states, 34 states have (on average 3.235294117647059) internal successors, (110), 35 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:25:49,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:49,389 INFO L93 Difference]: Finished difference Result 2568 states and 3432 transitions. [2022-11-19 08:25:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-19 08:25:49,389 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 3.235294117647059) internal successors, (110), 35 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 41 [2022-11-19 08:25:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:49,396 INFO L225 Difference]: With dead ends: 2568 [2022-11-19 08:25:49,397 INFO L226 Difference]: Without dead ends: 2568 [2022-11-19 08:25:49,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 74 SyntacticMatches, 8 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=596, Invalid=5724, Unknown=0, NotChecked=0, Total=6320 [2022-11-19 08:25:49,399 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 931 mSDsluCounter, 2103 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 2280 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:49,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 2280 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1710 Invalid, 0 Unknown, 113 Unchecked, 1.4s Time] [2022-11-19 08:25:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2568 states. [2022-11-19 08:25:49,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2568 to 1453. [2022-11-19 08:25:49,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1303 states have (on average 1.3891020721412126) internal successors, (1810), 1355 states have internal predecessors, (1810), 81 states have call successors, (81), 40 states have call predecessors, (81), 40 states have return successors, (81), 57 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-19 08:25:49,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 1972 transitions. [2022-11-19 08:25:49,438 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 1972 transitions. Word has length 41 [2022-11-19 08:25:49,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:49,438 INFO L495 AbstractCegarLoop]: Abstraction has 1453 states and 1972 transitions. [2022-11-19 08:25:49,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 3.235294117647059) internal successors, (110), 35 states have internal predecessors, (110), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-19 08:25:49,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 1972 transitions. [2022-11-19 08:25:49,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-19 08:25:49,439 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:49,440 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:49,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 08:25:49,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:49,646 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:49,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:49,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1655938516, now seen corresponding path program 1 times [2022-11-19 08:25:49,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:49,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296317189] [2022-11-19 08:25:49,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:49,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:49,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-19 08:25:49,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:49,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296317189] [2022-11-19 08:25:49,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296317189] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 08:25:49,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 08:25:49,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-19 08:25:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946128014] [2022-11-19 08:25:49,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 08:25:49,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-19 08:25:49,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 08:25:49,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-19 08:25:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-19 08:25:49,734 INFO L87 Difference]: Start difference. First operand 1453 states and 1972 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 08:25:50,021 INFO L93 Difference]: Finished difference Result 1848 states and 2493 transitions. [2022-11-19 08:25:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-19 08:25:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-11-19 08:25:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 08:25:50,027 INFO L225 Difference]: With dead ends: 1848 [2022-11-19 08:25:50,028 INFO L226 Difference]: Without dead ends: 1848 [2022-11-19 08:25:50,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-19 08:25:50,028 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 88 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 08:25:50,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 367 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 08:25:50,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2022-11-19 08:25:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1451. [2022-11-19 08:25:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1451 states, 1303 states have (on average 1.377590176515733) internal successors, (1795), 1353 states have internal predecessors, (1795), 81 states have call successors, (81), 40 states have call predecessors, (81), 40 states have return successors, (81), 57 states have call predecessors, (81), 81 states have call successors, (81) [2022-11-19 08:25:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1451 states to 1451 states and 1957 transitions. [2022-11-19 08:25:50,061 INFO L78 Accepts]: Start accepts. Automaton has 1451 states and 1957 transitions. Word has length 41 [2022-11-19 08:25:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 08:25:50,062 INFO L495 AbstractCegarLoop]: Abstraction has 1451 states and 1957 transitions. [2022-11-19 08:25:50,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-19 08:25:50,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1451 states and 1957 transitions. [2022-11-19 08:25:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-19 08:25:50,068 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 08:25:50,068 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 08:25:50,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-11-19 08:25:50,069 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 64 more)] === [2022-11-19 08:25:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 08:25:50,069 INFO L85 PathProgramCache]: Analyzing trace with hash 299704838, now seen corresponding path program 1 times [2022-11-19 08:25:50,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 08:25:50,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517626250] [2022-11-19 08:25:50,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:50,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 08:25:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:54,117 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-19 08:25:54,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 08:25:54,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517626250] [2022-11-19 08:25:54,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517626250] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 08:25:54,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715089342] [2022-11-19 08:25:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 08:25:54,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 08:25:54,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 08:25:54,120 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 08:25:54,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4c16d8c-1c00-406f-a537-b8bd13296c99/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 08:25:54,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 08:25:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 145 conjunts are in the unsatisfiable core [2022-11-19 08:25:54,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 08:25:54,489 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-19 08:25:54,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-19 08:25:54,714 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:25:54,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-19 08:25:54,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:54,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-19 08:25:54,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:54,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-11-19 08:25:55,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:25:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:25:55,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-19 08:25:55,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-19 08:25:55,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,441 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-19 08:25:55,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,450 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 50 treesize of output 52 [2022-11-19 08:25:55,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:55,619 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2022-11-19 08:25:55,619 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 60 [2022-11-19 08:25:55,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:55,630 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 61 treesize of output 66 [2022-11-19 08:25:56,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:25:56,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:56,451 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:25:56,451 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 133 treesize of output 77 [2022-11-19 08:25:56,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 08:25:56,469 INFO L321 Elim1Store]: treesize reduction 18, result has 14.3 percent of original size [2022-11-19 08:25:56,470 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 5 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 33 [2022-11-19 08:25:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 08:25:56,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 08:26:09,540 INFO L321 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2022-11-19 08:26:09,541 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 3 case distinctions, treesize of input 246 treesize of output 255 [2022-11-19 08:26:09,638 INFO L321 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2022-11-19 08:26:09,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 174 [2022-11-19 08:26:09,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:26:09,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 780 treesize of output 792 [2022-11-19 08:26:10,115 INFO L321 Elim1Store]: treesize reduction 152, result has 68.4 percent of original size [2022-11-19 08:26:10,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 47268 treesize of output 43718 [2022-11-19 08:26:10,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 08:26:10,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:26:10,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 353028 treesize of output 319858 [2022-11-19 08:26:13,271 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 333818 treesize of output 329522 [2022-11-19 08:26:18,052 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 4 [2022-11-19 08:26:22,962 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-19 08:26:22,963 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 380 treesize of output 362 [2022-11-19 08:30:47,766 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification. DAG size of input: 827 DAG size of output: 827 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)