./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/960521-1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/960521-1-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4591ef5e575ce80e216cc4837705a7c6f141a943d9af6ca1eb606ab877abd06b --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 18:31:58,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 18:31:58,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 18:31:58,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 18:31:58,974 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 18:31:58,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 18:31:58,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 18:31:58,979 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 18:31:58,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 18:31:58,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 18:31:58,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 18:31:58,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 18:31:58,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 18:31:58,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 18:31:58,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 18:31:58,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 18:31:58,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 18:31:58,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 18:31:58,991 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 18:31:58,993 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 18:31:58,994 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 18:31:58,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 18:31:58,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 18:31:58,999 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 18:31:59,001 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 18:31:59,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 18:31:59,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 18:31:59,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 18:31:59,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 18:31:59,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 18:31:59,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 18:31:59,011 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 18:31:59,012 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 18:31:59,013 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 18:31:59,013 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 18:31:59,014 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 18:31:59,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 18:31:59,015 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 18:31:59,015 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 18:31:59,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 18:31:59,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 18:31:59,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 18:31:59,021 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-12 18:31:59,047 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 18:31:59,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 18:31:59,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 18:31:59,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 18:31:59,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 18:31:59,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 18:31:59,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 18:31:59,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 18:31:59,049 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 18:31:59,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 18:31:59,050 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 18:31:59,050 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-12 18:31:59,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 18:31:59,050 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 18:31:59,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 18:31:59,050 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-12 18:31:59,050 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-12 18:31:59,050 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-12 18:31:59,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 18:31:59,051 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-12 18:31:59,051 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 18:31:59,051 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 18:31:59,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 18:31:59,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 18:31:59,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 18:31:59,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:31:59,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 18:31:59,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 18:31:59,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 18:31:59,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 18:31:59,053 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4591ef5e575ce80e216cc4837705a7c6f141a943d9af6ca1eb606ab877abd06b [2022-07-12 18:31:59,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 18:31:59,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 18:31:59,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 18:31:59,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 18:31:59,346 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 18:31:59,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/960521-1-1.i [2022-07-12 18:31:59,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4280626/56d435575da04271a1d7e12f4993dee1/FLAG75e0e105d [2022-07-12 18:31:59,859 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 18:31:59,864 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/960521-1-1.i [2022-07-12 18:31:59,873 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4280626/56d435575da04271a1d7e12f4993dee1/FLAG75e0e105d [2022-07-12 18:32:00,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f4280626/56d435575da04271a1d7e12f4993dee1 [2022-07-12 18:32:00,376 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 18:32:00,377 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 18:32:00,378 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 18:32:00,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 18:32:00,384 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 18:32:00,385 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f24624d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00, skipping insertion in model container [2022-07-12 18:32:00,386 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,390 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 18:32:00,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 18:32:00,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:32:00,653 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 18:32:00,692 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 18:32:00,720 INFO L208 MainTranslator]: Completed translation [2022-07-12 18:32:00,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00 WrapperNode [2022-07-12 18:32:00,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 18:32:00,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 18:32:00,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 18:32:00,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 18:32:00,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,787 INFO L137 Inliner]: procedures = 121, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-12 18:32:00,787 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 18:32:00,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 18:32:00,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 18:32:00,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 18:32:00,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,796 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,801 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,812 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,815 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,816 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,818 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 18:32:00,819 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 18:32:00,823 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 18:32:00,823 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 18:32:00,825 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (1/1) ... [2022-07-12 18:32:00,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 18:32:00,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:00,849 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-12 18:32:00,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-12 18:32:00,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-12 18:32:00,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-12 18:32:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-12 18:32:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 18:32:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-12 18:32:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 18:32:00,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 18:32:00,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 18:32:00,945 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 18:32:00,946 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 18:32:01,076 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 18:32:01,082 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 18:32:01,082 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-12 18:32:01,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:32:01 BoogieIcfgContainer [2022-07-12 18:32:01,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 18:32:01,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 18:32:01,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 18:32:01,088 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 18:32:01,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 06:32:00" (1/3) ... [2022-07-12 18:32:01,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6413f375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:32:01, skipping insertion in model container [2022-07-12 18:32:01,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 06:32:00" (2/3) ... [2022-07-12 18:32:01,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6413f375 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 06:32:01, skipping insertion in model container [2022-07-12 18:32:01,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 06:32:01" (3/3) ... [2022-07-12 18:32:01,091 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1-1.i [2022-07-12 18:32:01,102 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 18:32:01,103 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2022-07-12 18:32:01,139 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 18:32:01,145 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7e5a12a8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@35fe9dfa [2022-07-12 18:32:01,145 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2022-07-12 18:32:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-12 18:32:01,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:01,172 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-12 18:32:01,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:01,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:01,177 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2022-07-12 18:32:01,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:01,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989154432] [2022-07-12 18:32:01,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:01,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:01,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:01,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989154432] [2022-07-12 18:32:01,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989154432] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:01,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:32:01,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:32:01,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963155008] [2022-07-12 18:32:01,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:01,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:32:01,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:01,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:32:01,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:32:01,447 INFO L87 Difference]: Start difference. First operand has 51 states, 29 states have (on average 1.896551724137931) internal successors, (55), 50 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:01,519 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-07-12 18:32:01,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:32:01,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-12 18:32:01,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:01,529 INFO L225 Difference]: With dead ends: 50 [2022-07-12 18:32:01,530 INFO L226 Difference]: Without dead ends: 48 [2022-07-12 18:32:01,533 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 [2022-07-12 18:32:01,536 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:01,537 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 81 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:32:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-12 18:32:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-07-12 18:32:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-07-12 18:32:01,573 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 3 [2022-07-12 18:32:01,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:01,573 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-07-12 18:32:01,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-07-12 18:32:01,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-07-12 18:32:01,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:01,574 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-07-12 18:32:01,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 18:32:01,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:01,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:01,579 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2022-07-12 18:32:01,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:01,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720228798] [2022-07-12 18:32:01,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:01,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:01,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:01,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:01,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720228798] [2022-07-12 18:32:01,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720228798] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:01,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:32:01,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:32:01,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673561575] [2022-07-12 18:32:01,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:01,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:32:01,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:01,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:32:01,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:32:01,678 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:01,701 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2022-07-12 18:32:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:32:01,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2022-07-12 18:32:01,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:01,703 INFO L225 Difference]: With dead ends: 47 [2022-07-12 18:32:01,703 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 18:32:01,706 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 [2022-07-12 18:32:01,708 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:01,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 87 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:32:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 18:32:01,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-12 18:32:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.75) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-07-12 18:32:01,720 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 3 [2022-07-12 18:32:01,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:01,720 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-07-12 18:32:01,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,722 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-07-12 18:32:01,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:32:01,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:01,723 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:32:01,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 18:32:01,726 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:01,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:01,728 INFO L85 PathProgramCache]: Analyzing trace with hash 889446312, now seen corresponding path program 1 times [2022-07-12 18:32:01,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:01,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960450722] [2022-07-12 18:32:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:01,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:01,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:01,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:01,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960450722] [2022-07-12 18:32:01,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960450722] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:01,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:32:01,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:32:01,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316501873] [2022-07-12 18:32:01,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:01,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:32:01,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:01,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:32:01,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:32:01,820 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:01,875 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2022-07-12 18:32:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:32:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:32:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:01,877 INFO L225 Difference]: With dead ends: 44 [2022-07-12 18:32:01,877 INFO L226 Difference]: Without dead ends: 44 [2022-07-12 18:32:01,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:32:01,883 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 28 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:01,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:32:01,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-12 18:32:01,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-07-12 18:32:01,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-07-12 18:32:01,891 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 6 [2022-07-12 18:32:01,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:01,891 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-07-12 18:32:01,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:01,891 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-07-12 18:32:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-12 18:32:01,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:01,892 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-12 18:32:01,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 18:32:01,893 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:01,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:01,895 INFO L85 PathProgramCache]: Analyzing trace with hash 889446313, now seen corresponding path program 1 times [2022-07-12 18:32:01,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:01,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999881561] [2022-07-12 18:32:01,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:01,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:01,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:01,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999881561] [2022-07-12 18:32:01,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999881561] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:01,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:32:01,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 18:32:01,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292189733] [2022-07-12 18:32:01,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:01,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 18:32:01,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:01,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 18:32:01,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-12 18:32:01,989 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:02,065 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2022-07-12 18:32:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:32:02,066 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-12 18:32:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:02,066 INFO L225 Difference]: With dead ends: 50 [2022-07-12 18:32:02,067 INFO L226 Difference]: Without dead ends: 50 [2022-07-12 18:32:02,067 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 [2022-07-12 18:32:02,072 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:02,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 62 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:32:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-12 18:32:02,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-07-12 18:32:02,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 44 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:02,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-12 18:32:02,080 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 6 [2022-07-12 18:32:02,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:02,080 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-12 18:32:02,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:02,080 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-12 18:32:02,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-12 18:32:02,081 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:02,081 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:02,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 18:32:02,081 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:02,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1841820687, now seen corresponding path program 1 times [2022-07-12 18:32:02,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:02,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267843668] [2022-07-12 18:32:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:02,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:02,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267843668] [2022-07-12 18:32:02,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267843668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:02,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704987307] [2022-07-12 18:32:02,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:02,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:02,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:02,187 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:02,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 18:32:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:02,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 18:32:02,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:02,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:02,332 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:32:02,346 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:32:02,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:02,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:02,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704987307] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:02,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:32:02,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-07-12 18:32:02,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792576519] [2022-07-12 18:32:02,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:02,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:32:02,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:02,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:32:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:32:02,514 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:02,661 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2022-07-12 18:32:02,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 18:32:02,661 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-12 18:32:02,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:02,663 INFO L225 Difference]: With dead ends: 95 [2022-07-12 18:32:02,663 INFO L226 Difference]: Without dead ends: 95 [2022-07-12 18:32:02,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:32:02,664 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 302 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:02,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [302 Valid, 101 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:32:02,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-12 18:32:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 57. [2022-07-12 18:32:02,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.4883720930232558) internal successors, (64), 56 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-07-12 18:32:02,669 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 9 [2022-07-12 18:32:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:02,670 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-07-12 18:32:02,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-07-12 18:32:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:32:02,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:02,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:02,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-12 18:32:02,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:02,892 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:02,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:02,892 INFO L85 PathProgramCache]: Analyzing trace with hash 463101433, now seen corresponding path program 1 times [2022-07-12 18:32:02,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:02,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370780880] [2022-07-12 18:32:02,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:02,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:02,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 18:32:02,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:02,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370780880] [2022-07-12 18:32:02,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370780880] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:02,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:32:02,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 18:32:02,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802817964] [2022-07-12 18:32:02,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:02,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:32:02,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:02,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:32:02,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 18:32:02,928 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:02,966 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-07-12 18:32:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:32:02,966 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:32:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:02,967 INFO L225 Difference]: With dead ends: 55 [2022-07-12 18:32:02,967 INFO L226 Difference]: Without dead ends: 55 [2022-07-12 18:32:02,967 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 [2022-07-12 18:32:02,968 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:02,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 61 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:32:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-12 18:32:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-12 18:32:02,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.4186046511627908) internal successors, (61), 54 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:02,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2022-07-12 18:32:02,974 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 11 [2022-07-12 18:32:02,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:02,974 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2022-07-12 18:32:02,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:02,974 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2022-07-12 18:32:02,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 18:32:02,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:02,975 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:02,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 18:32:02,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:02,976 INFO L85 PathProgramCache]: Analyzing trace with hash 463101434, now seen corresponding path program 1 times [2022-07-12 18:32:02,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:02,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888669807] [2022-07-12 18:32:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:02,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:03,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:03,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888669807] [2022-07-12 18:32:03,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888669807] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:03,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331259160] [2022-07-12 18:32:03,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:03,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:03,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:03,038 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:03,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 18:32:03,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:03,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 18:32:03,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:03,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:03,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:03,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331259160] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:03,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:32:03,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-07-12 18:32:03,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867998126] [2022-07-12 18:32:03,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:03,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-12 18:32:03,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:03,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-12 18:32:03,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-07-12 18:32:03,146 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:03,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:03,218 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2022-07-12 18:32:03,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 18:32:03,219 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 18:32:03,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:03,222 INFO L225 Difference]: With dead ends: 87 [2022-07-12 18:32:03,222 INFO L226 Difference]: Without dead ends: 87 [2022-07-12 18:32:03,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:32:03,223 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 241 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:03,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 89 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 18:32:03,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-07-12 18:32:03,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 55. [2022-07-12 18:32:03,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 43 states have (on average 1.3488372093023255) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:03,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-07-12 18:32:03,234 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 11 [2022-07-12 18:32:03,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:03,235 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-07-12 18:32:03,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:03,235 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-07-12 18:32:03,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 18:32:03,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:03,236 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1] [2022-07-12 18:32:03,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:03,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-12 18:32:03,456 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:03,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:03,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1941957673, now seen corresponding path program 2 times [2022-07-12 18:32:03,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:03,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208955790] [2022-07-12 18:32:03,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:03,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:03,652 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:03,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208955790] [2022-07-12 18:32:03,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208955790] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:03,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659755645] [2022-07-12 18:32:03,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:32:03,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:03,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:03,654 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:03,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 18:32:03,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:32:03,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:32:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-12 18:32:03,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:03,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-12 18:32:03,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2022-07-12 18:32:03,730 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-12 18:32:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:03,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:04,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659755645] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:04,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:32:04,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2022-07-12 18:32:04,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844739457] [2022-07-12 18:32:04,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:04,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 18:32:04,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:04,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 18:32:04,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2022-07-12 18:32:04,288 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:04,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:04,688 INFO L93 Difference]: Finished difference Result 184 states and 190 transitions. [2022-07-12 18:32:04,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 18:32:04,688 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-12 18:32:04,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:04,689 INFO L225 Difference]: With dead ends: 184 [2022-07-12 18:32:04,689 INFO L226 Difference]: Without dead ends: 184 [2022-07-12 18:32:04,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=251, Invalid=505, Unknown=0, NotChecked=0, Total=756 [2022-07-12 18:32:04,690 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1077 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:04,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 157 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:32:04,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-07-12 18:32:04,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 59. [2022-07-12 18:32:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-07-12 18:32:04,694 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 18 [2022-07-12 18:32:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:04,694 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-07-12 18:32:04,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.260869565217391) internal successors, (52), 24 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-07-12 18:32:04,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 18:32:04,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:04,696 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:04,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-12 18:32:04,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:04,912 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:04,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:04,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1502042668, now seen corresponding path program 2 times [2022-07-12 18:32:04,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:04,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309110514] [2022-07-12 18:32:04,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:04,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:04,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:05,025 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 18:32:05,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309110514] [2022-07-12 18:32:05,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309110514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:05,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663336092] [2022-07-12 18:32:05,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:32:05,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:05,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:05,028 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:05,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 18:32:05,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-07-12 18:32:05,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:32:05,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 18:32:05,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:05,115 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:05,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:32:05,223 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-12 18:32:05,223 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:32:05,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663336092] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:05,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:32:05,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10] total 12 [2022-07-12 18:32:05,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676377350] [2022-07-12 18:32:05,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:05,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 18:32:05,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:05,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 18:32:05,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:32:05,225 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:05,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:05,253 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2022-07-12 18:32:05,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 18:32:05,254 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-12 18:32:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:05,254 INFO L225 Difference]: With dead ends: 47 [2022-07-12 18:32:05,254 INFO L226 Difference]: Without dead ends: 47 [2022-07-12 18:32:05,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2022-07-12 18:32:05,255 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:05,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 28 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:32:05,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-12 18:32:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-07-12 18:32:05,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2022-07-12 18:32:05,258 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 26 [2022-07-12 18:32:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:05,258 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2022-07-12 18:32:05,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2022-07-12 18:32:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-12 18:32:05,259 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:05,260 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:05,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:05,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:05,467 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:05,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1911110645, now seen corresponding path program 1 times [2022-07-12 18:32:05,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:05,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055795688] [2022-07-12 18:32:05,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:05,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:05,563 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:32:05,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055795688] [2022-07-12 18:32:05,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055795688] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:05,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116097004] [2022-07-12 18:32:05,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:05,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:05,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:05,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:05,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 18:32:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:05,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-12 18:32:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:32:05,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:05,881 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:32:05,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116097004] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:05,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:32:05,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-07-12 18:32:05,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354827969] [2022-07-12 18:32:05,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:05,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-12 18:32:05,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:05,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-12 18:32:05,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2022-07-12 18:32:05,883 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:06,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:06,132 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2022-07-12 18:32:06,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 18:32:06,133 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-12 18:32:06,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:06,134 INFO L225 Difference]: With dead ends: 205 [2022-07-12 18:32:06,134 INFO L226 Difference]: Without dead ends: 205 [2022-07-12 18:32:06,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2022-07-12 18:32:06,135 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 576 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:06,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 149 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 18:32:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-07-12 18:32:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 86. [2022-07-12 18:32:06,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1358024691358024) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 92 transitions. [2022-07-12 18:32:06,139 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 92 transitions. Word has length 29 [2022-07-12 18:32:06,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:06,140 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 92 transitions. [2022-07-12 18:32:06,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 92 transitions. [2022-07-12 18:32:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-12 18:32:06,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:06,141 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:06,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-12 18:32:06,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-12 18:32:06,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash -248790283, now seen corresponding path program 2 times [2022-07-12 18:32:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:06,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486914533] [2022-07-12 18:32:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:06,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:32:06,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:06,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486914533] [2022-07-12 18:32:06,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486914533] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:06,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744799654] [2022-07-12 18:32:06,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:32:06,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:06,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:06,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:06,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 18:32:06,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:32:06,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:32:06,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-12 18:32:06,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:07,004 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:32:07,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:07,336 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:32:07,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744799654] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:07,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:32:07,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2022-07-12 18:32:07,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128115114] [2022-07-12 18:32:07,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:07,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-12 18:32:07,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:07,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-12 18:32:07,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 18:32:07,340 INFO L87 Difference]: Start difference. First operand 86 states and 92 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:08,026 INFO L93 Difference]: Finished difference Result 437 states and 438 transitions. [2022-07-12 18:32:08,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-12 18:32:08,028 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-12 18:32:08,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:08,030 INFO L225 Difference]: With dead ends: 437 [2022-07-12 18:32:08,030 INFO L226 Difference]: Without dead ends: 437 [2022-07-12 18:32:08,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2022-07-12 18:32:08,033 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 1554 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1554 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:08,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1554 Valid, 244 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 18:32:08,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-07-12 18:32:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 158. [2022-07-12 18:32:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 157 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:08,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 172 transitions. [2022-07-12 18:32:08,038 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 172 transitions. Word has length 53 [2022-07-12 18:32:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:08,039 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 172 transitions. [2022-07-12 18:32:08,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 49 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:08,039 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 172 transitions. [2022-07-12 18:32:08,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-12 18:32:08,041 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:08,041 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:08,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:08,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:08,256 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:08,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:08,256 INFO L85 PathProgramCache]: Analyzing trace with hash -2038312715, now seen corresponding path program 3 times [2022-07-12 18:32:08,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:08,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464045664] [2022-07-12 18:32:08,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:08,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 18:32:08,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:08,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464045664] [2022-07-12 18:32:08,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464045664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:08,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333007283] [2022-07-12 18:32:08,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:32:08,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:08,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:08,760 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:08,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 18:32:08,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 18:32:08,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:32:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 18:32:08,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:08,866 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-12 18:32:08,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-07-12 18:32:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-07-12 18:32:09,268 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 18:32:09,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333007283] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:09,269 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 18:32:09,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [34] total 38 [2022-07-12 18:32:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141150507] [2022-07-12 18:32:09,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:09,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 18:32:09,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 18:32:09,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:32:09,271 INFO L87 Difference]: Start difference. First operand 158 states and 172 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:09,303 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2022-07-12 18:32:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 18:32:09,303 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-12 18:32:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:09,304 INFO L225 Difference]: With dead ends: 157 [2022-07-12 18:32:09,304 INFO L226 Difference]: Without dead ends: 157 [2022-07-12 18:32:09,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=545, Invalid=861, Unknown=0, NotChecked=0, Total=1406 [2022-07-12 18:32:09,307 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:09,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 26 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:32:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-12 18:32:09,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-07-12 18:32:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:09,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-07-12 18:32:09,311 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 101 [2022-07-12 18:32:09,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:09,311 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-07-12 18:32:09,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:09,312 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-07-12 18:32:09,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-12 18:32:09,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:09,316 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:09,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 18:32:09,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:09,532 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:09,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:09,532 INFO L85 PathProgramCache]: Analyzing trace with hash -376576047, now seen corresponding path program 1 times [2022-07-12 18:32:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:09,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106637533] [2022-07-12 18:32:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:09,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:09,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2022-07-12 18:32:09,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:09,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106637533] [2022-07-12 18:32:09,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106637533] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 18:32:09,631 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 18:32:09,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 18:32:09,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601313747] [2022-07-12 18:32:09,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 18:32:09,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 18:32:09,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:09,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 18:32:09,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 18:32:09,633 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:09,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:09,641 INFO L93 Difference]: Finished difference Result 155 states and 156 transitions. [2022-07-12 18:32:09,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 18:32:09,641 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2022-07-12 18:32:09,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:09,642 INFO L225 Difference]: With dead ends: 155 [2022-07-12 18:32:09,642 INFO L226 Difference]: Without dead ends: 155 [2022-07-12 18:32:09,643 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 [2022-07-12 18:32:09,643 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:09,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 18:32:09,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-12 18:32:09,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-07-12 18:32:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 153 states have (on average 1.0196078431372548) internal successors, (156), 154 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2022-07-12 18:32:09,647 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 147 [2022-07-12 18:32:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:09,647 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2022-07-12 18:32:09,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:09,648 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2022-07-12 18:32:09,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-07-12 18:32:09,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:09,650 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:09,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 18:32:09,650 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:09,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1112325229, now seen corresponding path program 1 times [2022-07-12 18:32:09,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:09,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377419001] [2022-07-12 18:32:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:09,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2022-07-12 18:32:09,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:09,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377419001] [2022-07-12 18:32:09,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377419001] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:09,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60592411] [2022-07-12 18:32:09,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:09,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:09,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:09,888 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:09,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 18:32:10,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:10,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-12 18:32:10,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-07-12 18:32:10,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:11,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 1335 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-07-12 18:32:11,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60592411] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:11,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:32:11,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 34, 34] total 82 [2022-07-12 18:32:11,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028080795] [2022-07-12 18:32:11,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:11,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-07-12 18:32:11,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:11,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-07-12 18:32:11,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2370, Invalid=4272, Unknown=0, NotChecked=0, Total=6642 [2022-07-12 18:32:11,948 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand has 82 states, 82 states have (on average 3.1097560975609757) internal successors, (255), 82 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:13,772 INFO L93 Difference]: Finished difference Result 779 states and 780 transitions. [2022-07-12 18:32:13,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 18:32:13,773 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.1097560975609757) internal successors, (255), 82 states have internal predecessors, (255), 0 states have call successors, (0), 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 149 [2022-07-12 18:32:13,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:13,775 INFO L225 Difference]: With dead ends: 779 [2022-07-12 18:32:13,775 INFO L226 Difference]: Without dead ends: 779 [2022-07-12 18:32:13,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3949 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4529, Invalid=8353, Unknown=0, NotChecked=0, Total=12882 [2022-07-12 18:32:13,778 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2747 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2747 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 443 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:13,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2747 Valid, 484 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [443 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 18:32:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-07-12 18:32:13,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 299. [2022-07-12 18:32:13,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 297 states have (on average 1.0101010101010102) internal successors, (300), 298 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 300 transitions. [2022-07-12 18:32:13,786 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 300 transitions. Word has length 149 [2022-07-12 18:32:13,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:13,786 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 300 transitions. [2022-07-12 18:32:13,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.1097560975609757) internal successors, (255), 82 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:13,786 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 300 transitions. [2022-07-12 18:32:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-07-12 18:32:13,793 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:13,793 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 62, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:13,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-07-12 18:32:14,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-12 18:32:14,016 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:14,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1743233901, now seen corresponding path program 2 times [2022-07-12 18:32:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:14,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790571926] [2022-07-12 18:32:14,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:14,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:14,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:14,597 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 5735 trivial. 0 not checked. [2022-07-12 18:32:14,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:14,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790571926] [2022-07-12 18:32:14,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790571926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:14,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034491432] [2022-07-12 18:32:14,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 18:32:14,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:14,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:14,600 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:14,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 18:32:14,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 18:32:14,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 18:32:14,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-12 18:32:14,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 18:32:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2022-07-12 18:32:16,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 18:32:20,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7161 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2022-07-12 18:32:20,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034491432] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 18:32:20,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 18:32:20,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 66, 66] total 162 [2022-07-12 18:32:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483755517] [2022-07-12 18:32:20,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 18:32:20,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-07-12 18:32:20,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 18:32:20,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-07-12 18:32:20,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9346, Invalid=16736, Unknown=0, NotChecked=0, Total=26082 [2022-07-12 18:32:20,544 INFO L87 Difference]: Start difference. First operand 299 states and 300 transitions. Second operand has 162 states, 162 states have (on average 3.0555555555555554) internal successors, (495), 162 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:28,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 18:32:28,165 INFO L93 Difference]: Finished difference Result 1579 states and 1580 transitions. [2022-07-12 18:32:28,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-07-12 18:32:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 3.0555555555555554) internal successors, (495), 162 states have internal predecessors, (495), 0 states have call successors, (0), 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 293 [2022-07-12 18:32:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 18:32:28,170 INFO L225 Difference]: With dead ends: 1579 [2022-07-12 18:32:28,170 INFO L226 Difference]: Without dead ends: 1579 [2022-07-12 18:32:28,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16093 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=17761, Invalid=33089, Unknown=0, NotChecked=0, Total=50850 [2022-07-12 18:32:28,176 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 4796 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 841 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4796 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 1768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-12 18:32:28,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4796 Valid, 851 Invalid, 1768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [841 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-12 18:32:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-07-12 18:32:28,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 587. [2022-07-12 18:32:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 585 states have (on average 1.005128205128205) internal successors, (588), 586 states have internal predecessors, (588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 588 transitions. [2022-07-12 18:32:28,195 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 588 transitions. Word has length 293 [2022-07-12 18:32:28,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 18:32:28,196 INFO L495 AbstractCegarLoop]: Abstraction has 587 states and 588 transitions. [2022-07-12 18:32:28,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 3.0555555555555554) internal successors, (495), 162 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 18:32:28,197 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 588 transitions. [2022-07-12 18:32:28,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 582 [2022-07-12 18:32:28,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 18:32:28,206 INFO L195 NwaCegarLoop]: trace histogram [126, 126, 126, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 18:32:28,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-12 18:32:28,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-12 18:32:28,423 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 18 more)] === [2022-07-12 18:32:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 18:32:28,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1251511955, now seen corresponding path program 3 times [2022-07-12 18:32:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 18:32:28,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155165652] [2022-07-12 18:32:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 18:32:28,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 18:32:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 18:32:30,103 INFO L134 CoverageAnalysis]: Checked inductivity of 29673 backedges. 0 proven. 5922 refuted. 0 times theorem prover too weak. 23751 trivial. 0 not checked. [2022-07-12 18:32:30,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 18:32:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155165652] [2022-07-12 18:32:30,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155165652] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 18:32:30,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183539342] [2022-07-12 18:32:30,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 18:32:30,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 18:32:30,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 18:32:30,107 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 18:32:30,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process