./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0235-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version eb692b52 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/test-0235-2.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 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-20 05:40:00,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 05:40:00,954 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 05:40:00,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 05:40:00,991 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 05:40:00,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 05:40:00,994 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 05:40:00,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 05:40:00,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 05:40:01,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 05:40:01,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 05:40:01,002 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 05:40:01,003 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 05:40:01,004 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 05:40:01,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 05:40:01,007 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 05:40:01,008 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 05:40:01,009 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 05:40:01,010 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 05:40:01,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 05:40:01,016 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 05:40:01,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 05:40:01,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 05:40:01,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 05:40:01,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 05:40:01,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 05:40:01,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 05:40:01,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 05:40:01,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 05:40:01,026 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 05:40:01,027 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 05:40:01,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 05:40:01,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 05:40:01,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 05:40:01,030 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 05:40:01,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 05:40:01,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 05:40:01,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 05:40:01,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 05:40:01,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 05:40:01,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 05:40:01,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 05:40:01,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-20 05:40:01,056 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 05:40:01,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 05:40:01,057 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 05:40:01,057 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 05:40:01,057 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 05:40:01,058 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 05:40:01,058 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 05:40:01,058 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 05:40:01,058 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 05:40:01,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 05:40:01,059 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 05:40:01,060 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-20 05:40:01,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 05:40:01,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 05:40:01,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 05:40:01,060 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-20 05:40:01,060 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-20 05:40:01,060 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-20 05:40:01,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 05:40:01,061 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-20 05:40:01,062 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 05:40:01,062 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 05:40:01,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 05:40:01,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 05:40:01,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 05:40:01,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:40:01,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 05:40:01,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 05:40:01,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 05:40:01,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 05:40:01,063 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5243781ee83706d005235269371a592cabf9c2dbc613c235cbe81d6e89d326d7 [2022-07-20 05:40:01,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 05:40:01,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 05:40:01,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 05:40:01,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 05:40:01,266 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 05:40:01,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0235-2.i [2022-07-20 05:40:01,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2921a73bb/e0a93958086b4175894aee822656890f/FLAG7fe652220 [2022-07-20 05:40:01,733 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 05:40:01,733 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0235-2.i [2022-07-20 05:40:01,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2921a73bb/e0a93958086b4175894aee822656890f/FLAG7fe652220 [2022-07-20 05:40:02,117 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2921a73bb/e0a93958086b4175894aee822656890f [2022-07-20 05:40:02,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 05:40:02,120 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 05:40:02,121 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 05:40:02,121 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 05:40:02,126 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 05:40:02,127 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,127 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47486b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02, skipping insertion in model container [2022-07-20 05:40:02,128 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 05:40:02,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 05:40:02,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:40:02,463 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 05:40:02,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 05:40:02,538 INFO L208 MainTranslator]: Completed translation [2022-07-20 05:40:02,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02 WrapperNode [2022-07-20 05:40:02,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 05:40:02,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 05:40:02,540 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 05:40:02,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 05:40:02,556 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,568 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,604 INFO L137 Inliner]: procedures = 188, calls = 71, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 237 [2022-07-20 05:40:02,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 05:40:02,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 05:40:02,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 05:40:02,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 05:40:02,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,622 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,625 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,645 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,649 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 05:40:02,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 05:40:02,652 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 05:40:02,652 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 05:40:02,653 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (1/1) ... [2022-07-20 05:40:02,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 05:40:02,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:02,687 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) [2022-07-20 05:40:02,733 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 [2022-07-20 05:40:02,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 05:40:02,748 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 05:40:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-20 05:40:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-20 05:40:02,749 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-20 05:40:02,749 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-20 05:40:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 05:40:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-20 05:40:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure l0_destroy [2022-07-20 05:40:02,750 INFO L138 BoogieDeclarations]: Found implementation of procedure l0_destroy [2022-07-20 05:40:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 05:40:02,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 05:40:02,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 05:40:02,908 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 05:40:02,909 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 05:40:03,279 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 05:40:03,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 05:40:03,285 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-20 05:40:03,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:40:03 BoogieIcfgContainer [2022-07-20 05:40:03,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 05:40:03,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 05:40:03,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 05:40:03,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 05:40:03,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:40:02" (1/3) ... [2022-07-20 05:40:03,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fc331c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:40:03, skipping insertion in model container [2022-07-20 05:40:03,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:40:02" (2/3) ... [2022-07-20 05:40:03,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fc331c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:40:03, skipping insertion in model container [2022-07-20 05:40:03,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:40:03" (3/3) ... [2022-07-20 05:40:03,293 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0235-2.i [2022-07-20 05:40:03,304 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 05:40:03,305 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 87 error locations. [2022-07-20 05:40:03,345 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 05:40:03,350 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@7722e298, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26a19996 [2022-07-20 05:40:03,351 INFO L358 AbstractCegarLoop]: Starting to check reachability of 87 error locations. [2022-07-20 05:40:03,354 INFO L276 IsEmpty]: Start isEmpty. Operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 05:40:03,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-20 05:40:03,359 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:03,359 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-20 05:40:03,359 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:03,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:03,363 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-07-20 05:40:03,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:03,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140416870] [2022-07-20 05:40:03,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:03,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:03,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:40:03,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:03,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140416870] [2022-07-20 05:40:03,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140416870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:03,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:03,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:40:03,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141686672] [2022-07-20 05:40:03,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:03,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 05:40:03,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 05:40:03,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 05:40:03,490 INFO L87 Difference]: Start difference. First operand has 238 states, 136 states have (on average 1.875) internal successors, (255), 223 states have internal predecessors, (255), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:40:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:03,527 INFO L93 Difference]: Finished difference Result 238 states and 268 transitions. [2022-07-20 05:40:03,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 05:40:03,529 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2022-07-20 05:40:03,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:03,538 INFO L225 Difference]: With dead ends: 238 [2022-07-20 05:40:03,538 INFO L226 Difference]: Without dead ends: 236 [2022-07-20 05:40:03,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 05:40:03,542 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:03,543 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:40:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-20 05:40:03,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-07-20 05:40:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 135 states have (on average 1.7925925925925925) internal successors, (242), 221 states have internal predecessors, (242), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 05:40:03,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 266 transitions. [2022-07-20 05:40:03,594 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 266 transitions. Word has length 4 [2022-07-20 05:40:03,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:03,594 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 266 transitions. [2022-07-20 05:40:03,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:40:03,594 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 266 transitions. [2022-07-20 05:40:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-20 05:40:03,595 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:03,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-20 05:40:03,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 05:40:03,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:03,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:03,596 INFO L85 PathProgramCache]: Analyzing trace with hash 889937946, now seen corresponding path program 1 times [2022-07-20 05:40:03,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:03,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193407640] [2022-07-20 05:40:03,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:03,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:03,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:03,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1030094600] [2022-07-20 05:40:03,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:03,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:03,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:03,658 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) [2022-07-20 05:40:03,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 05:40:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:03,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 05:40:03,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:03,827 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:40:03,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:03,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:03,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193407640] [2022-07-20 05:40:03,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:03,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030094600] [2022-07-20 05:40:03,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030094600] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:03,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:03,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:40:03,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782393321] [2022-07-20 05:40:03,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:03,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:40:03,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:40:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:03,844 INFO L87 Difference]: Start difference. First operand 236 states and 266 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:40:03,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:03,941 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2022-07-20 05:40:03,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:40:03,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-07-20 05:40:03,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:03,943 INFO L225 Difference]: With dead ends: 235 [2022-07-20 05:40:03,943 INFO L226 Difference]: Without dead ends: 235 [2022-07-20 05:40:03,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:03,944 INFO L413 NwaCegarLoop]: 260 mSDtfsCounter, 9 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:03,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 428 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-07-20 05:40:03,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-07-20 05:40:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 135 states have (on average 1.7851851851851852) internal successors, (241), 220 states have internal predecessors, (241), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 05:40:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 265 transitions. [2022-07-20 05:40:03,952 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 265 transitions. Word has length 6 [2022-07-20 05:40:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:03,952 INFO L495 AbstractCegarLoop]: Abstraction has 235 states and 265 transitions. [2022-07-20 05:40:03,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:40:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 265 transitions. [2022-07-20 05:40:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-20 05:40:03,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:03,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:03,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:04,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:04,173 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:04,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1818272976, now seen corresponding path program 1 times [2022-07-20 05:40:04,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:04,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936204886] [2022-07-20 05:40:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:04,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:04,192 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:04,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797891394] [2022-07-20 05:40:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:04,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:04,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:04,196 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) [2022-07-20 05:40:04,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 05:40:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:04,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-20 05:40:04,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:04,306 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:04,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 05:40:04,364 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:04,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:04,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936204886] [2022-07-20 05:40:04,364 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797891394] [2022-07-20 05:40:04,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797891394] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:04,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:04,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:40:04,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435825110] [2022-07-20 05:40:04,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:04,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:40:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:04,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:40:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:04,367 INFO L87 Difference]: Start difference. First operand 235 states and 265 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:40:04,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:04,374 INFO L93 Difference]: Finished difference Result 234 states and 264 transitions. [2022-07-20 05:40:04,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:40:04,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-07-20 05:40:04,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:04,375 INFO L225 Difference]: With dead ends: 234 [2022-07-20 05:40:04,375 INFO L226 Difference]: Without dead ends: 234 [2022-07-20 05:40:04,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:04,378 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 0 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:04,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 453 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 72 Unchecked, 0.0s Time] [2022-07-20 05:40:04,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-07-20 05:40:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-07-20 05:40:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 135 states have (on average 1.7777777777777777) internal successors, (240), 219 states have internal predecessors, (240), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 05:40:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 264 transitions. [2022-07-20 05:40:04,386 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 264 transitions. Word has length 7 [2022-07-20 05:40:04,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:04,387 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 264 transitions. [2022-07-20 05:40:04,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 05:40:04,387 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 264 transitions. [2022-07-20 05:40:04,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:40:04,389 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:04,389 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:04,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:04,606 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,SelfDestructingSolverStorable2 [2022-07-20 05:40:04,606 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:04,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:04,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1116483670, now seen corresponding path program 1 times [2022-07-20 05:40:04,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:04,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576253843] [2022-07-20 05:40:04,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:04,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:04,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:04,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [762923347] [2022-07-20 05:40:04,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:04,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:04,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:04,624 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) [2022-07-20 05:40:04,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 05:40:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 05:40:04,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:04,957 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:40:04,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-20 05:40:04,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:05,187 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 05:40:05,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-20 05:40:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-20 05:40:05,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576253843] [2022-07-20 05:40:05,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:05,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762923347] [2022-07-20 05:40:05,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762923347] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:40:05,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:40:05,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-20 05:40:05,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568641527] [2022-07-20 05:40:05,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:05,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:40:05,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:40:05,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:40:05,221 INFO L87 Difference]: Start difference. First operand 234 states and 264 transitions. Second operand has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 05:40:13,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:13,699 INFO L93 Difference]: Finished difference Result 253 states and 288 transitions. [2022-07-20 05:40:13,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:40:13,699 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2022-07-20 05:40:13,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:13,702 INFO L225 Difference]: With dead ends: 253 [2022-07-20 05:40:13,702 INFO L226 Difference]: Without dead ends: 253 [2022-07-20 05:40:13,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:40:13,703 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 99 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 1765 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:13,703 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 1765 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 669 Invalid, 0 Unknown, 242 Unchecked, 0.3s Time] [2022-07-20 05:40:13,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-07-20 05:40:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 243. [2022-07-20 05:40:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 144 states have (on average 1.7361111111111112) internal successors, (250), 226 states have internal predecessors, (250), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-20 05:40:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 275 transitions. [2022-07-20 05:40:13,712 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 275 transitions. Word has length 73 [2022-07-20 05:40:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:13,712 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 275 transitions. [2022-07-20 05:40:13,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 05:40:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 275 transitions. [2022-07-20 05:40:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-20 05:40:13,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:13,714 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:13,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-20 05:40:13,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:13,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:13,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1116483669, now seen corresponding path program 1 times [2022-07-20 05:40:13,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:13,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856687596] [2022-07-20 05:40:13,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:13,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:13,953 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:13,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [31950426] [2022-07-20 05:40:13,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:13,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:13,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:13,961 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) [2022-07-20 05:40:13,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 05:40:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:14,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-20 05:40:14,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:14,118 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:40:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:14,504 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:40:14,512 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:40:14,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:40:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-20 05:40:14,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:14,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:14,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856687596] [2022-07-20 05:40:14,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:14,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31950426] [2022-07-20 05:40:14,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31950426] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:14,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:14,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-20 05:40:14,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632390062] [2022-07-20 05:40:14,621 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:14,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:40:14,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:14,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:40:14,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:40:14,621 INFO L87 Difference]: Start difference. First operand 243 states and 275 transitions. Second operand has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:15,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:15,643 INFO L93 Difference]: Finished difference Result 343 states and 394 transitions. [2022-07-20 05:40:15,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 05:40:15,643 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 73 [2022-07-20 05:40:15,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:15,645 INFO L225 Difference]: With dead ends: 343 [2022-07-20 05:40:15,645 INFO L226 Difference]: Without dead ends: 343 [2022-07-20 05:40:15,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:40:15,646 INFO L413 NwaCegarLoop]: 205 mSDtfsCounter, 112 mSDsluCounter, 572 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 1955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 755 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:15,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 777 Invalid, 1955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1188 Invalid, 0 Unknown, 755 Unchecked, 0.8s Time] [2022-07-20 05:40:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-07-20 05:40:15,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 242. [2022-07-20 05:40:15,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 144 states have (on average 1.7222222222222223) internal successors, (248), 225 states have internal predecessors, (248), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-20 05:40:15,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 273 transitions. [2022-07-20 05:40:15,656 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 273 transitions. Word has length 73 [2022-07-20 05:40:15,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:15,658 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 273 transitions. [2022-07-20 05:40:15,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 273 transitions. [2022-07-20 05:40:15,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-20 05:40:15,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:15,663 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:15,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:15,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:15,877 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1277004054, now seen corresponding path program 1 times [2022-07-20 05:40:15,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:15,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791590866] [2022-07-20 05:40:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:15,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:15,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:15,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345009300] [2022-07-20 05:40:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:15,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:15,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:15,926 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) [2022-07-20 05:40:15,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 05:40:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:16,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 05:40:16,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:16,196 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:40:16,197 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:16,207 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-20 05:40:16,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:16,374 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 05:40:16,374 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-20 05:40:16,388 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-20 05:40:16,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:16,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791590866] [2022-07-20 05:40:16,388 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:16,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345009300] [2022-07-20 05:40:16,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345009300] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:40:16,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:40:16,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-20 05:40:16,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002852955] [2022-07-20 05:40:16,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:16,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:40:16,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:16,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:40:16,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-20 05:40:16,391 INFO L87 Difference]: Start difference. First operand 242 states and 273 transitions. Second operand has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 05:40:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:24,781 INFO L93 Difference]: Finished difference Result 256 states and 291 transitions. [2022-07-20 05:40:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:40:24,782 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-07-20 05:40:24,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:24,783 INFO L225 Difference]: With dead ends: 256 [2022-07-20 05:40:24,783 INFO L226 Difference]: Without dead ends: 256 [2022-07-20 05:40:24,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 133 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:40:24,784 INFO L413 NwaCegarLoop]: 235 mSDtfsCounter, 107 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:24,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 1600 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 656 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-07-20 05:40:24,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-07-20 05:40:24,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 240. [2022-07-20 05:40:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 143 states have (on average 1.7202797202797202) internal successors, (246), 224 states have internal predecessors, (246), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-20 05:40:24,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 270 transitions. [2022-07-20 05:40:24,790 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 270 transitions. Word has length 74 [2022-07-20 05:40:24,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:24,790 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 270 transitions. [2022-07-20 05:40:24,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-20 05:40:24,790 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 270 transitions. [2022-07-20 05:40:24,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 05:40:24,792 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:24,792 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:24,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:25,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:25,007 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:25,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:25,008 INFO L85 PathProgramCache]: Analyzing trace with hash 801017355, now seen corresponding path program 1 times [2022-07-20 05:40:25,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:25,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550616251] [2022-07-20 05:40:25,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:25,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:25,022 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:25,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971096550] [2022-07-20 05:40:25,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:25,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:25,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:25,026 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) [2022-07-20 05:40:25,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 05:40:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:25,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-20 05:40:25,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:25,281 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:40:25,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:25,336 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:40:25,336 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:25,348 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 05:40:25,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:25,570 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 05:40:25,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-20 05:40:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 05:40:25,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:25,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550616251] [2022-07-20 05:40:25,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:25,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971096550] [2022-07-20 05:40:25,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971096550] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:40:25,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:40:25,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-20 05:40:25,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519165063] [2022-07-20 05:40:25,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:25,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-20 05:40:25,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-20 05:40:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-20 05:40:25,586 INFO L87 Difference]: Start difference. First operand 240 states and 270 transitions. Second operand has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 05:40:26,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:26,053 INFO L93 Difference]: Finished difference Result 406 states and 471 transitions. [2022-07-20 05:40:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:40:26,054 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 75 [2022-07-20 05:40:26,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:26,056 INFO L225 Difference]: With dead ends: 406 [2022-07-20 05:40:26,056 INFO L226 Difference]: Without dead ends: 406 [2022-07-20 05:40:26,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:40:26,056 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 299 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 1345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:26,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 2009 Invalid, 1345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1003 Invalid, 0 Unknown, 311 Unchecked, 0.4s Time] [2022-07-20 05:40:26,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-07-20 05:40:26,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 264. [2022-07-20 05:40:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 164 states have (on average 1.6402439024390243) internal successors, (269), 244 states have internal predecessors, (269), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 05:40:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 297 transitions. [2022-07-20 05:40:26,063 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 297 transitions. Word has length 75 [2022-07-20 05:40:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:26,064 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 297 transitions. [2022-07-20 05:40:26,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-20 05:40:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 297 transitions. [2022-07-20 05:40:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-20 05:40:26,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:26,064 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:26,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:26,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:26,265 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:26,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:26,266 INFO L85 PathProgramCache]: Analyzing trace with hash 801017356, now seen corresponding path program 1 times [2022-07-20 05:40:26,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:26,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336173063] [2022-07-20 05:40:26,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:26,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:26,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:26,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681501988] [2022-07-20 05:40:26,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:26,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:26,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:26,297 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) [2022-07-20 05:40:26,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 05:40:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:26,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-20 05:40:26,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:26,438 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:40:26,927 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:26,927 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:26,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:40:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:27,081 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:40:27,096 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:40:27,097 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:40:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:40:27,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:27,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:27,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336173063] [2022-07-20 05:40:27,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:27,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681501988] [2022-07-20 05:40:27,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681501988] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:27,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:27,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-07-20 05:40:27,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768452273] [2022-07-20 05:40:27,243 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:27,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-20 05:40:27,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:27,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-20 05:40:27,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:40:27,244 INFO L87 Difference]: Start difference. First operand 264 states and 297 transitions. Second operand has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:28,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:28,489 INFO L93 Difference]: Finished difference Result 365 states and 417 transitions. [2022-07-20 05:40:28,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:40:28,490 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 75 [2022-07-20 05:40:28,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:28,492 INFO L225 Difference]: With dead ends: 365 [2022-07-20 05:40:28,492 INFO L226 Difference]: Without dead ends: 365 [2022-07-20 05:40:28,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:40:28,492 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 114 mSDsluCounter, 626 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 988 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:28,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 828 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1182 Invalid, 0 Unknown, 988 Unchecked, 1.0s Time] [2022-07-20 05:40:28,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-20 05:40:28,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 264. [2022-07-20 05:40:28,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 164 states have (on average 1.6341463414634145) internal successors, (268), 244 states have internal predecessors, (268), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 05:40:28,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 296 transitions. [2022-07-20 05:40:28,498 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 296 transitions. Word has length 75 [2022-07-20 05:40:28,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:28,498 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 296 transitions. [2022-07-20 05:40:28,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:28,499 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 296 transitions. [2022-07-20 05:40:28,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-20 05:40:28,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:28,500 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:28,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:28,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:28,711 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash -938265759, now seen corresponding path program 1 times [2022-07-20 05:40:28,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:28,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168585884] [2022-07-20 05:40:28,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:28,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:28,724 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:28,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1787376509] [2022-07-20 05:40:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:28,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:28,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:28,736 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) [2022-07-20 05:40:28,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 05:40:28,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:28,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 05:40:28,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-20 05:40:28,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:28,945 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 8 treesize of output 6 [2022-07-20 05:40:29,018 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 32 proven. 8 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-20 05:40:29,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:29,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168585884] [2022-07-20 05:40:29,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:29,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787376509] [2022-07-20 05:40:29,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787376509] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:40:29,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:40:29,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-20 05:40:29,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300612414] [2022-07-20 05:40:29,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:40:29,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:29,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:40:29,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:40:29,022 INFO L87 Difference]: Start difference. First operand 264 states and 296 transitions. Second operand has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:29,224 INFO L93 Difference]: Finished difference Result 282 states and 321 transitions. [2022-07-20 05:40:29,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 05:40:29,224 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-20 05:40:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:29,225 INFO L225 Difference]: With dead ends: 282 [2022-07-20 05:40:29,226 INFO L226 Difference]: Without dead ends: 282 [2022-07-20 05:40:29,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-20 05:40:29,227 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 317 mSDsluCounter, 1289 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:29,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 1520 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:40:29,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-20 05:40:29,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 263. [2022-07-20 05:40:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 164 states have (on average 1.6280487804878048) internal successors, (267), 243 states have internal predecessors, (267), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 05:40:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 295 transitions. [2022-07-20 05:40:29,236 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 295 transitions. Word has length 76 [2022-07-20 05:40:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:29,237 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 295 transitions. [2022-07-20 05:40:29,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 295 transitions. [2022-07-20 05:40:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-07-20 05:40:29,238 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:29,238 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:29,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:29,456 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,SelfDestructingSolverStorable8 [2022-07-20 05:40:29,456 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:29,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash 269737250, now seen corresponding path program 1 times [2022-07-20 05:40:29,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:29,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346899106] [2022-07-20 05:40:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:29,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:29,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:29,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096799555] [2022-07-20 05:40:29,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:29,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:29,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:29,469 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) [2022-07-20 05:40:29,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 05:40:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:29,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:40:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:29,604 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 05:40:29,604 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:29,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:29,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346899106] [2022-07-20 05:40:29,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:29,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096799555] [2022-07-20 05:40:29,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096799555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:29,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:29,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:40:29,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521890934] [2022-07-20 05:40:29,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:29,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:40:29,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:29,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:40:29,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:29,607 INFO L87 Difference]: Start difference. First operand 263 states and 295 transitions. Second operand has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:29,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:29,696 INFO L93 Difference]: Finished difference Result 270 states and 306 transitions. [2022-07-20 05:40:29,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:40:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 78 [2022-07-20 05:40:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:29,698 INFO L225 Difference]: With dead ends: 270 [2022-07-20 05:40:29,698 INFO L226 Difference]: Without dead ends: 270 [2022-07-20 05:40:29,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:40:29,699 INFO L413 NwaCegarLoop]: 231 mSDtfsCounter, 94 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:29,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 357 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:29,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-20 05:40:29,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 262. [2022-07-20 05:40:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 164 states have (on average 1.6219512195121952) internal successors, (266), 242 states have internal predecessors, (266), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-20 05:40:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 294 transitions. [2022-07-20 05:40:29,704 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 294 transitions. Word has length 78 [2022-07-20 05:40:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:29,704 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 294 transitions. [2022-07-20 05:40:29,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.0) internal successors, (26), 3 states have internal predecessors, (26), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:40:29,704 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 294 transitions. [2022-07-20 05:40:29,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 05:40:29,704 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:29,704 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:29,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:29,914 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,SelfDestructingSolverStorable9 [2022-07-20 05:40:29,914 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:29,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:29,914 INFO L85 PathProgramCache]: Analyzing trace with hash -88647287, now seen corresponding path program 1 times [2022-07-20 05:40:29,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:29,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707531601] [2022-07-20 05:40:29,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:29,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:29,934 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:29,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [303762733] [2022-07-20 05:40:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:29,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:29,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:29,954 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) [2022-07-20 05:40:29,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 05:40:30,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:30,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 05:40:30,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:30,216 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:30,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:30,265 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:30,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:30,334 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:40:30,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:40:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 05:40:30,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:30,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:30,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707531601] [2022-07-20 05:40:30,503 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:30,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303762733] [2022-07-20 05:40:30,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303762733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:30,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:30,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-20 05:40:30,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149679985] [2022-07-20 05:40:30,503 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:30,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 05:40:30,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 05:40:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:40:30,504 INFO L87 Difference]: Start difference. First operand 262 states and 294 transitions. Second operand has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:35,014 INFO L93 Difference]: Finished difference Result 330 states and 376 transitions. [2022-07-20 05:40:35,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:40:35,014 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 82 [2022-07-20 05:40:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:35,015 INFO L225 Difference]: With dead ends: 330 [2022-07-20 05:40:35,015 INFO L226 Difference]: Without dead ends: 330 [2022-07-20 05:40:35,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2022-07-20 05:40:35,016 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 123 mSDsluCounter, 1772 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:35,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 2002 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 757 Invalid, 0 Unknown, 368 Unchecked, 0.3s Time] [2022-07-20 05:40:35,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-07-20 05:40:35,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 321. [2022-07-20 05:40:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 215 states have (on average 1.5069767441860464) internal successors, (324), 292 states have internal predecessors, (324), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (24), 19 states have call predecessors, (24), 19 states have call successors, (24) [2022-07-20 05:40:35,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 367 transitions. [2022-07-20 05:40:35,022 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 367 transitions. Word has length 82 [2022-07-20 05:40:35,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:35,022 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 367 transitions. [2022-07-20 05:40:35,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 367 transitions. [2022-07-20 05:40:35,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-20 05:40:35,025 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:35,025 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:35,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:35,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-20 05:40:35,231 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash -88647286, now seen corresponding path program 1 times [2022-07-20 05:40:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:35,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295404050] [2022-07-20 05:40:35,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:35,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:35,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:35,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1668174526] [2022-07-20 05:40:35,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:35,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:35,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:35,258 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:40:35,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 05:40:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:35,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-20 05:40:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:35,416 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:40:35,925 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:35,926 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:35,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:40:36,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:36,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:40:36,132 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:40:36,133 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:40:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:36,300 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:40:36,322 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-20 05:40:36,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 25 [2022-07-20 05:40:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 73 proven. 40 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-20 05:40:36,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:36,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:36,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295404050] [2022-07-20 05:40:36,545 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:36,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668174526] [2022-07-20 05:40:36,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668174526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:36,546 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:36,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-20 05:40:36,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992289874] [2022-07-20 05:40:36,546 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:36,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-20 05:40:36,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:36,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-20 05:40:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-07-20 05:40:36,547 INFO L87 Difference]: Start difference. First operand 321 states and 367 transitions. Second operand has 17 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:40:38,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:38,097 INFO L93 Difference]: Finished difference Result 466 states and 540 transitions. [2022-07-20 05:40:38,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 05:40:38,098 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 82 [2022-07-20 05:40:38,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:38,101 INFO L225 Difference]: With dead ends: 466 [2022-07-20 05:40:38,101 INFO L226 Difference]: Without dead ends: 466 [2022-07-20 05:40:38,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-07-20 05:40:38,104 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 121 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 2293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1146 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:38,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 855 Invalid, 2293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1133 Invalid, 0 Unknown, 1146 Unchecked, 1.2s Time] [2022-07-20 05:40:38,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-07-20 05:40:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 343. [2022-07-20 05:40:38,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 235 states have (on average 1.476595744680851) internal successors, (347), 311 states have internal predecessors, (347), 21 states have call successors, (21), 9 states have call predecessors, (21), 9 states have return successors, (26), 22 states have call predecessors, (26), 21 states have call successors, (26) [2022-07-20 05:40:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 394 transitions. [2022-07-20 05:40:38,117 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 394 transitions. Word has length 82 [2022-07-20 05:40:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:38,117 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 394 transitions. [2022-07-20 05:40:38,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:40:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 394 transitions. [2022-07-20 05:40:38,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-20 05:40:38,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:38,119 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:38,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:38,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 05:40:38,327 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:38,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:38,327 INFO L85 PathProgramCache]: Analyzing trace with hash -927383707, now seen corresponding path program 1 times [2022-07-20 05:40:38,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:38,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155304123] [2022-07-20 05:40:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:38,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:38,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803893625] [2022-07-20 05:40:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:38,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:38,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:38,340 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:40:38,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-20 05:40:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:38,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-20 05:40:38,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:38,576 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:38,576 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:38,668 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:38,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:40:38,798 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:40:38,798 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 05:40:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 75 proven. 51 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-20 05:40:38,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:39,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155304123] [2022-07-20 05:40:39,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:39,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803893625] [2022-07-20 05:40:39,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803893625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:39,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:39,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-20 05:40:39,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643684418] [2022-07-20 05:40:39,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:39,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:40:39,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:39,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:40:39,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:40:39,286 INFO L87 Difference]: Start difference. First operand 343 states and 394 transitions. Second operand has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:43,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:43,873 INFO L93 Difference]: Finished difference Result 402 states and 458 transitions. [2022-07-20 05:40:43,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:40:43,874 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2022-07-20 05:40:43,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:43,875 INFO L225 Difference]: With dead ends: 402 [2022-07-20 05:40:43,875 INFO L226 Difference]: Without dead ends: 402 [2022-07-20 05:40:43,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 87 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=216, Invalid=1266, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:40:43,876 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 214 mSDsluCounter, 2639 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 2868 SdHoareTripleChecker+Invalid, 1769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 924 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:43,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 2868 Invalid, 1769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 839 Invalid, 0 Unknown, 924 Unchecked, 0.3s Time] [2022-07-20 05:40:43,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-20 05:40:43,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 328. [2022-07-20 05:40:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 222 states have (on average 1.4954954954954955) internal successors, (332), 299 states have internal predecessors, (332), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 05:40:43,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 370 transitions. [2022-07-20 05:40:43,882 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 370 transitions. Word has length 83 [2022-07-20 05:40:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:43,882 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 370 transitions. [2022-07-20 05:40:43,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 17 states have internal predecessors, (63), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 370 transitions. [2022-07-20 05:40:43,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-20 05:40:43,887 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:43,887 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:43,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:44,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-20 05:40:44,106 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:44,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1546901432, now seen corresponding path program 1 times [2022-07-20 05:40:44,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:44,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346375857] [2022-07-20 05:40:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:44,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:44,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:44,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1484314188] [2022-07-20 05:40:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:44,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:44,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:44,129 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:40:44,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-20 05:40:44,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:44,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:40:44,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2022-07-20 05:40:44,311 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:40:44,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:44,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346375857] [2022-07-20 05:40:44,312 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:44,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484314188] [2022-07-20 05:40:44,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484314188] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:40:44,312 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:40:44,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:40:44,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812175798] [2022-07-20 05:40:44,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:40:44,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:40:44,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:40:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:40:44,314 INFO L87 Difference]: Start difference. First operand 328 states and 370 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:44,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:44,398 INFO L93 Difference]: Finished difference Result 341 states and 388 transitions. [2022-07-20 05:40:44,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:40:44,399 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 83 [2022-07-20 05:40:44,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:44,401 INFO L225 Difference]: With dead ends: 341 [2022-07-20 05:40:44,401 INFO L226 Difference]: Without dead ends: 341 [2022-07-20 05:40:44,402 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:40:44,402 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 161 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:44,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 527 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:40:44,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-07-20 05:40:44,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 327. [2022-07-20 05:40:44,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 222 states have (on average 1.490990990990991) internal successors, (331), 298 states have internal predecessors, (331), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 05:40:44,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 369 transitions. [2022-07-20 05:40:44,421 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 369 transitions. Word has length 83 [2022-07-20 05:40:44,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:44,421 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 369 transitions. [2022-07-20 05:40:44,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:40:44,421 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 369 transitions. [2022-07-20 05:40:44,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-20 05:40:44,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:44,422 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:44,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-20 05:40:44,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-20 05:40:44,643 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:44,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:44,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1546901433, now seen corresponding path program 1 times [2022-07-20 05:40:44,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:44,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014317092] [2022-07-20 05:40:44,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:44,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:44,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:44,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404250491] [2022-07-20 05:40:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:44,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:44,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:44,658 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:40:44,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-20 05:40:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:44,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-20 05:40:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:44,853 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:44,862 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-20 05:40:45,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:45,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:40:45,838 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:45,838 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:46,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:46,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:40:46,261 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:40:46,262 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:40:47,292 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:40:47,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:40:47,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:40:47,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014317092] [2022-07-20 05:40:47,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:40:47,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404250491] [2022-07-20 05:40:47,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404250491] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:40:47,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:40:47,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-20 05:40:47,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853380354] [2022-07-20 05:40:47,569 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:40:47,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 05:40:47,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:40:47,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 05:40:47,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:40:47,570 INFO L87 Difference]: Start difference. First operand 327 states and 369 transitions. Second operand has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:40:48,265 INFO L93 Difference]: Finished difference Result 510 states and 596 transitions. [2022-07-20 05:40:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:40:48,266 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 83 [2022-07-20 05:40:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:40:48,267 INFO L225 Difference]: With dead ends: 510 [2022-07-20 05:40:48,267 INFO L226 Difference]: Without dead ends: 510 [2022-07-20 05:40:48,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:40:48,268 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 115 mSDsluCounter, 755 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 953 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2095 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:40:48,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 953 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 2095 Unchecked, 0.2s Time] [2022-07-20 05:40:48,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2022-07-20 05:40:48,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 382. [2022-07-20 05:40:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 269 states have (on average 1.4349442379182156) internal successors, (386), 347 states have internal predecessors, (386), 23 states have call successors, (23), 9 states have call predecessors, (23), 13 states have return successors, (36), 25 states have call predecessors, (36), 23 states have call successors, (36) [2022-07-20 05:40:48,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 445 transitions. [2022-07-20 05:40:48,276 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 445 transitions. Word has length 83 [2022-07-20 05:40:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:40:48,276 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 445 transitions. [2022-07-20 05:40:48,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.235294117647059) internal successors, (55), 17 states have internal predecessors, (55), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:40:48,277 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 445 transitions. [2022-07-20 05:40:48,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-20 05:40:48,277 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:40:48,277 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:40:48,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-07-20 05:40:48,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:48,492 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:40:48,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:40:48,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1315876189, now seen corresponding path program 1 times [2022-07-20 05:40:48,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:40:48,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749033629] [2022-07-20 05:40:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:48,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:40:48,509 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:40:48,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1789392125] [2022-07-20 05:40:48,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:40:48,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:40:48,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:40:48,519 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:40:48,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-20 05:40:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:40:48,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-20 05:40:48,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:40:48,683 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:40:48,697 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-20 05:40:56,449 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:40:56,449 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:40:56,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2022-07-20 05:40:58,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:40:58,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2022-07-20 05:40:58,684 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:40:58,684 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:41:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:41:02,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:02,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:02,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749033629] [2022-07-20 05:41:02,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:02,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789392125] [2022-07-20 05:41:02,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789392125] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:02,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:02,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-07-20 05:41:02,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884641635] [2022-07-20 05:41:02,912 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:02,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 05:41:02,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:02,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 05:41:02,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-07-20 05:41:02,914 INFO L87 Difference]: Start difference. First operand 382 states and 445 transitions. Second operand has 22 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:08,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:08,199 INFO L93 Difference]: Finished difference Result 648 states and 787 transitions. [2022-07-20 05:41:08,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 05:41:08,199 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 84 [2022-07-20 05:41:08,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:08,203 INFO L225 Difference]: With dead ends: 648 [2022-07-20 05:41:08,203 INFO L226 Difference]: Without dead ends: 648 [2022-07-20 05:41:08,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:41:08,204 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 172 mSDsluCounter, 1628 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 3743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3502 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:08,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 1895 Invalid, 3743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 229 Invalid, 0 Unknown, 3502 Unchecked, 0.2s Time] [2022-07-20 05:41:08,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-07-20 05:41:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 394. [2022-07-20 05:41:08,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 279 states have (on average 1.4265232974910393) internal successors, (398), 359 states have internal predecessors, (398), 23 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (45), 25 states have call predecessors, (45), 23 states have call successors, (45) [2022-07-20 05:41:08,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 466 transitions. [2022-07-20 05:41:08,218 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 466 transitions. Word has length 84 [2022-07-20 05:41:08,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:08,218 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 466 transitions. [2022-07-20 05:41:08,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.8) internal successors, (56), 19 states have internal predecessors, (56), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:08,219 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 466 transitions. [2022-07-20 05:41:08,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-07-20 05:41:08,220 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:08,220 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:08,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:08,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-20 05:41:08,435 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:08,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1220193167, now seen corresponding path program 2 times [2022-07-20 05:41:08,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:08,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128738045] [2022-07-20 05:41:08,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:08,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:08,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:08,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [325093553] [2022-07-20 05:41:08,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:41:08,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:08,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:08,452 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:08,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-20 05:41:08,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:41:08,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:41:08,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 619 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-20 05:41:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:08,666 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:41:08,679 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-20 05:41:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:41:09,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:41:09,997 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:09,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:10,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:41:10,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:41:10,421 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:41:10,422 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:41:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 83 proven. 27 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-20 05:41:11,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:11,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128738045] [2022-07-20 05:41:11,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:11,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325093553] [2022-07-20 05:41:11,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325093553] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:11,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:11,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-20 05:41:11,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882854607] [2022-07-20 05:41:11,851 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:11,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-20 05:41:11,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:11,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-20 05:41:11,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:41:11,852 INFO L87 Difference]: Start difference. First operand 394 states and 466 transitions. Second operand has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:41:12,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:12,740 INFO L93 Difference]: Finished difference Result 615 states and 743 transitions. [2022-07-20 05:41:12,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:41:12,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 84 [2022-07-20 05:41:12,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:12,742 INFO L225 Difference]: With dead ends: 615 [2022-07-20 05:41:12,742 INFO L226 Difference]: Without dead ends: 615 [2022-07-20 05:41:12,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:41:12,743 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 115 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1942 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:12,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 873 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 223 Invalid, 0 Unknown, 1942 Unchecked, 0.2s Time] [2022-07-20 05:41:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-07-20 05:41:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 416. [2022-07-20 05:41:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 295 states have (on average 1.4101694915254237) internal successors, (416), 377 states have internal predecessors, (416), 27 states have call successors, (27), 9 states have call predecessors, (27), 17 states have return successors, (61), 29 states have call predecessors, (61), 27 states have call successors, (61) [2022-07-20 05:41:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 504 transitions. [2022-07-20 05:41:12,752 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 504 transitions. Word has length 84 [2022-07-20 05:41:12,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:12,752 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 504 transitions. [2022-07-20 05:41:12,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:41:12,753 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 504 transitions. [2022-07-20 05:41:12,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-20 05:41:12,753 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:12,753 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:12,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:12,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-20 05:41:12,967 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:12,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1550939079, now seen corresponding path program 3 times [2022-07-20 05:41:12,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:12,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885994890] [2022-07-20 05:41:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:12,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:13,005 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:13,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659207014] [2022-07-20 05:41:13,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 05:41:13,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:13,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:13,015 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:13,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-20 05:41:13,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-20 05:41:13,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:41:13,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:41:13,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:13,196 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-20 05:41:13,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:13,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:13,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885994890] [2022-07-20 05:41:13,197 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:13,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659207014] [2022-07-20 05:41:13,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659207014] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:13,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:13,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:41:13,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240561048] [2022-07-20 05:41:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:13,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:41:13,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:13,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:41:13,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:41:13,199 INFO L87 Difference]: Start difference. First operand 416 states and 504 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:13,240 INFO L93 Difference]: Finished difference Result 405 states and 460 transitions. [2022-07-20 05:41:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-20 05:41:13,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) Word has length 85 [2022-07-20 05:41:13,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:13,244 INFO L225 Difference]: With dead ends: 405 [2022-07-20 05:41:13,244 INFO L226 Difference]: Without dead ends: 365 [2022-07-20 05:41:13,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:41:13,245 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 12 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:13,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 962 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 05:41:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-07-20 05:41:13,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 335. [2022-07-20 05:41:13,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 230 states have (on average 1.4739130434782608) internal successors, (339), 306 states have internal predecessors, (339), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 05:41:13,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 377 transitions. [2022-07-20 05:41:13,254 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 377 transitions. Word has length 85 [2022-07-20 05:41:13,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:13,254 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 377 transitions. [2022-07-20 05:41:13,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 5 states have internal predecessors, (40), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:13,255 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 377 transitions. [2022-07-20 05:41:13,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-20 05:41:13,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:13,255 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:13,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:13,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-20 05:41:13,475 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:13,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:13,475 INFO L85 PathProgramCache]: Analyzing trace with hash 109000903, now seen corresponding path program 4 times [2022-07-20 05:41:13,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:13,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305569103] [2022-07-20 05:41:13,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:13,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:13,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:13,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [776252257] [2022-07-20 05:41:13,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 05:41:13,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:13,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:13,498 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:13,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-20 05:41:13,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 05:41:13,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:41:13,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-20 05:41:13,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:13,883 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:41:13,894 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 0 case distinctions, treesize of input 10 treesize of output 9 [2022-07-20 05:41:13,908 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:41:14,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:41:14,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:41:14,729 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:14,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:14,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:41:14,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-07-20 05:41:14,967 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:41:14,967 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:41:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 100 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-20 05:41:15,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:16,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305569103] [2022-07-20 05:41:16,142 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:16,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776252257] [2022-07-20 05:41:16,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776252257] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:16,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:16,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-20 05:41:16,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596125043] [2022-07-20 05:41:16,143 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:16,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:41:16,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:16,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:41:16,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:41:16,145 INFO L87 Difference]: Start difference. First operand 335 states and 377 transitions. Second operand has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:17,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:17,133 INFO L93 Difference]: Finished difference Result 518 states and 604 transitions. [2022-07-20 05:41:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:41:17,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 89 [2022-07-20 05:41:17,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:17,135 INFO L225 Difference]: With dead ends: 518 [2022-07-20 05:41:17,135 INFO L226 Difference]: Without dead ends: 518 [2022-07-20 05:41:17,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:41:17,136 INFO L413 NwaCegarLoop]: 211 mSDtfsCounter, 114 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 2592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2228 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:17,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1113 Invalid, 2592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 352 Invalid, 0 Unknown, 2228 Unchecked, 0.2s Time] [2022-07-20 05:41:17,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-07-20 05:41:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 378. [2022-07-20 05:41:17,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 267 states have (on average 1.4307116104868913) internal successors, (382), 343 states have internal predecessors, (382), 23 states have call successors, (23), 9 states have call predecessors, (23), 11 states have return successors, (32), 25 states have call predecessors, (32), 23 states have call successors, (32) [2022-07-20 05:41:17,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 437 transitions. [2022-07-20 05:41:17,145 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 437 transitions. Word has length 89 [2022-07-20 05:41:17,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:17,145 INFO L495 AbstractCegarLoop]: Abstraction has 378 states and 437 transitions. [2022-07-20 05:41:17,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:17,154 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 437 transitions. [2022-07-20 05:41:17,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-20 05:41:17,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:17,155 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:17,189 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:17,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:17,357 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:17,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:17,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1896002525, now seen corresponding path program 5 times [2022-07-20 05:41:17,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:17,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280276462] [2022-07-20 05:41:17,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:17,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:17,372 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:17,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778767527] [2022-07-20 05:41:17,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 05:41:17,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:17,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:17,374 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:17,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-20 05:41:17,540 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:41:17,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:41:17,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-20 05:41:17,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 111 proven. 1 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-07-20 05:41:17,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 47 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-20 05:41:17,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:17,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280276462] [2022-07-20 05:41:17,685 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:17,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778767527] [2022-07-20 05:41:17,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778767527] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:41:17,685 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:41:17,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-20 05:41:17,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200487033] [2022-07-20 05:41:17,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:17,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:41:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:17,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:41:17,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:41:17,687 INFO L87 Difference]: Start difference. First operand 378 states and 437 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-20 05:41:17,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:17,819 INFO L93 Difference]: Finished difference Result 411 states and 457 transitions. [2022-07-20 05:41:17,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-20 05:41:17,820 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 90 [2022-07-20 05:41:17,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:17,821 INFO L225 Difference]: With dead ends: 411 [2022-07-20 05:41:17,821 INFO L226 Difference]: Without dead ends: 351 [2022-07-20 05:41:17,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-07-20 05:41:17,825 INFO L413 NwaCegarLoop]: 248 mSDtfsCounter, 51 mSDsluCounter, 1201 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:17,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1449 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:41:17,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-07-20 05:41:17,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-07-20 05:41:17,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 246 states have (on average 1.443089430894309) internal successors, (355), 322 states have internal predecessors, (355), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 05:41:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 393 transitions. [2022-07-20 05:41:17,835 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 393 transitions. Word has length 90 [2022-07-20 05:41:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:17,835 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 393 transitions. [2022-07-20 05:41:17,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 states have internal predecessors, (59), 2 states have call successors, (10), 2 states have call predecessors, (10), 4 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-07-20 05:41:17,836 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 393 transitions. [2022-07-20 05:41:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-20 05:41:17,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:17,836 INFO L195 NwaCegarLoop]: trace histogram [22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:17,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-20 05:41:18,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:18,052 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:18,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:18,052 INFO L85 PathProgramCache]: Analyzing trace with hash -495641031, now seen corresponding path program 6 times [2022-07-20 05:41:18,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:18,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824567927] [2022-07-20 05:41:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:18,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:18,076 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:18,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493475783] [2022-07-20 05:41:18,076 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 05:41:18,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:18,078 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:18,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-20 05:41:19,775 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-20 05:41:19,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:41:19,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-20 05:41:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-20 05:41:19,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:20,238 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 110 proven. 3 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2022-07-20 05:41:20,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824567927] [2022-07-20 05:41:20,239 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:20,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493475783] [2022-07-20 05:41:20,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493475783] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:41:20,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:41:20,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-20 05:41:20,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591417794] [2022-07-20 05:41:20,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:20,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-20 05:41:20,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:20,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-20 05:41:20,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:41:20,241 INFO L87 Difference]: Start difference. First operand 351 states and 393 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-20 05:41:20,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:20,551 INFO L93 Difference]: Finished difference Result 407 states and 457 transitions. [2022-07-20 05:41:20,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-20 05:41:20,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 105 [2022-07-20 05:41:20,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:20,553 INFO L225 Difference]: With dead ends: 407 [2022-07-20 05:41:20,553 INFO L226 Difference]: Without dead ends: 367 [2022-07-20 05:41:20,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:41:20,554 INFO L413 NwaCegarLoop]: 250 mSDtfsCounter, 67 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:20,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 1460 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:41:20,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-07-20 05:41:20,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 367. [2022-07-20 05:41:20,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 262 states have (on average 1.416030534351145) internal successors, (371), 338 states have internal predecessors, (371), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 05:41:20,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 409 transitions. [2022-07-20 05:41:20,567 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 409 transitions. Word has length 105 [2022-07-20 05:41:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:20,567 INFO L495 AbstractCegarLoop]: Abstraction has 367 states and 409 transitions. [2022-07-20 05:41:20,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 12 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2022-07-20 05:41:20,568 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 409 transitions. [2022-07-20 05:41:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-07-20 05:41:20,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:20,568 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:20,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:20,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-20 05:41:20,787 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:20,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:20,787 INFO L85 PathProgramCache]: Analyzing trace with hash -414151, now seen corresponding path program 7 times [2022-07-20 05:41:20,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:20,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737666113] [2022-07-20 05:41:20,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:20,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:20,810 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:20,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1805216172] [2022-07-20 05:41:20,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-20 05:41:20,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:20,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:20,812 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:20,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-20 05:41:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:21,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-20 05:41:21,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:21,763 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:41:22,077 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:22,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:41:22,092 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:22,092 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:22,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:41:22,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:41:22,248 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:41:22,249 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:41:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 326 proven. 116 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-20 05:41:22,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:22,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737666113] [2022-07-20 05:41:22,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805216172] [2022-07-20 05:41:22,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805216172] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:22,419 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:22,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-20 05:41:22,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52052302] [2022-07-20 05:41:22,419 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:22,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-20 05:41:22,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:22,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-20 05:41:22,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-20 05:41:22,422 INFO L87 Difference]: Start difference. First operand 367 states and 409 transitions. Second operand has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:41:23,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:23,392 INFO L93 Difference]: Finished difference Result 478 states and 543 transitions. [2022-07-20 05:41:23,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:41:23,394 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 109 [2022-07-20 05:41:23,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:23,395 INFO L225 Difference]: With dead ends: 478 [2022-07-20 05:41:23,396 INFO L226 Difference]: Without dead ends: 478 [2022-07-20 05:41:23,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-07-20 05:41:23,396 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 111 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 571 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:23,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 902 Invalid, 1986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1400 Invalid, 0 Unknown, 571 Unchecked, 0.8s Time] [2022-07-20 05:41:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-07-20 05:41:23,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 375. [2022-07-20 05:41:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 270 states have (on average 1.4148148148148147) internal successors, (382), 346 states have internal predecessors, (382), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 05:41:23,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 420 transitions. [2022-07-20 05:41:23,425 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 420 transitions. Word has length 109 [2022-07-20 05:41:23,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:23,426 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 420 transitions. [2022-07-20 05:41:23,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:41:23,426 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 420 transitions. [2022-07-20 05:41:23,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-20 05:41:23,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:23,427 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:23,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:23,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-20 05:41:23,633 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:23,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:23,633 INFO L85 PathProgramCache]: Analyzing trace with hash -397998918, now seen corresponding path program 1 times [2022-07-20 05:41:23,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:23,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684118072] [2022-07-20 05:41:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:23,658 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:23,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879903632] [2022-07-20 05:41:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:23,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:23,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:23,660 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:23,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-20 05:41:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:23,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:41:23,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:23,966 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:23,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:23,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:23,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684118072] [2022-07-20 05:41:23,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:23,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879903632] [2022-07-20 05:41:23,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879903632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:23,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:23,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:41:23,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299259469] [2022-07-20 05:41:23,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:23,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:41:23,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:41:23,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:41:23,969 INFO L87 Difference]: Start difference. First operand 375 states and 420 transitions. Second operand has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:24,077 INFO L93 Difference]: Finished difference Result 380 states and 428 transitions. [2022-07-20 05:41:24,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:41:24,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 111 [2022-07-20 05:41:24,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:24,079 INFO L225 Difference]: With dead ends: 380 [2022-07-20 05:41:24,079 INFO L226 Difference]: Without dead ends: 380 [2022-07-20 05:41:24,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:41:24,080 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 80 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:24,080 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 362 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:41:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-07-20 05:41:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 374. [2022-07-20 05:41:24,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 270 states have (on average 1.4111111111111112) internal successors, (381), 345 states have internal predecessors, (381), 19 states have call successors, (19), 9 states have call predecessors, (19), 9 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-20 05:41:24,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 419 transitions. [2022-07-20 05:41:24,085 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 419 transitions. Word has length 111 [2022-07-20 05:41:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:24,085 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 419 transitions. [2022-07-20 05:41:24,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 17.0) internal successors, (34), 3 states have internal predecessors, (34), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 419 transitions. [2022-07-20 05:41:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 05:41:24,086 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:24,086 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:24,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:24,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:24,287 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1352185183, now seen corresponding path program 1 times [2022-07-20 05:41:24,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:24,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10215028] [2022-07-20 05:41:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:24,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:24,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:24,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [799939134] [2022-07-20 05:41:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:24,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:24,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:24,322 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:24,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-20 05:41:24,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:24,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-20 05:41:24,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:24,746 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:24,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:24,805 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:24,805 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:24,908 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:24,908 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:41:25,025 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:25,026 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 05:41:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 328 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-20 05:41:25,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:25,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:25,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10215028] [2022-07-20 05:41:25,517 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:25,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799939134] [2022-07-20 05:41:25,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799939134] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:25,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:25,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-20 05:41:25,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754916095] [2022-07-20 05:41:25,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:25,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:41:25,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:25,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:41:25,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-20 05:41:25,522 INFO L87 Difference]: Start difference. First operand 374 states and 419 transitions. Second operand has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:41:30,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:30,132 INFO L93 Difference]: Finished difference Result 568 states and 636 transitions. [2022-07-20 05:41:30,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-20 05:41:30,132 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 115 [2022-07-20 05:41:30,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:30,134 INFO L225 Difference]: With dead ends: 568 [2022-07-20 05:41:30,134 INFO L226 Difference]: Without dead ends: 568 [2022-07-20 05:41:30,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 134 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:41:30,135 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 154 mSDsluCounter, 2631 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 2856 SdHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 430 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:30,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 2856 Invalid, 1349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 913 Invalid, 0 Unknown, 430 Unchecked, 0.4s Time] [2022-07-20 05:41:30,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-07-20 05:41:30,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2022-07-20 05:41:30,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 436 states have (on average 1.3073394495412844) internal successors, (570), 510 states have internal predecessors, (570), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-20 05:41:30,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 630 transitions. [2022-07-20 05:41:30,142 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 630 transitions. Word has length 115 [2022-07-20 05:41:30,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:30,142 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 630 transitions. [2022-07-20 05:41:30,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 17 states have internal predecessors, (74), 3 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-20 05:41:30,142 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 630 transitions. [2022-07-20 05:41:30,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-20 05:41:30,143 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:30,143 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:30,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:30,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:30,363 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:30,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1352185182, now seen corresponding path program 1 times [2022-07-20 05:41:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:30,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806046352] [2022-07-20 05:41:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:30,391 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:30,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1875024774] [2022-07-20 05:41:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:30,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:30,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:30,393 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:30,394 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-20 05:41:31,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:31,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 158 conjunts are in the unsatisfiable core [2022-07-20 05:41:31,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:31,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-20 05:41:31,511 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:41:32,385 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:32,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-07-20 05:41:32,467 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:32,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:33,037 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:33,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:33,043 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:41:33,714 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:41:33,715 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:41:33,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:41:34,163 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-20 05:41:34,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-07-20 05:41:34,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 5 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:41:34,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-07-20 05:41:34,502 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 242 proven. 300 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-20 05:41:34,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:34,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:34,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806046352] [2022-07-20 05:41:34,783 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:34,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875024774] [2022-07-20 05:41:34,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875024774] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:34,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:34,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-07-20 05:41:34,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450839216] [2022-07-20 05:41:34,784 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:34,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-20 05:41:34,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:34,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-20 05:41:34,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:41:34,786 INFO L87 Difference]: Start difference. First operand 558 states and 630 transitions. Second operand has 36 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 31 states have internal predecessors, (84), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:41:37,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:37,074 INFO L93 Difference]: Finished difference Result 668 states and 761 transitions. [2022-07-20 05:41:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:41:37,075 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 31 states have internal predecessors, (84), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 115 [2022-07-20 05:41:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:37,077 INFO L225 Difference]: With dead ends: 668 [2022-07-20 05:41:37,077 INFO L226 Difference]: Without dead ends: 668 [2022-07-20 05:41:37,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=217, Invalid=1853, Unknown=0, NotChecked=0, Total=2070 [2022-07-20 05:41:37,078 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 124 mSDsluCounter, 1255 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1439 SdHoareTripleChecker+Invalid, 3389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2263 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:37,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1439 Invalid, 3389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1113 Invalid, 0 Unknown, 2263 Unchecked, 1.7s Time] [2022-07-20 05:41:37,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-07-20 05:41:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 565. [2022-07-20 05:41:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 443 states have (on average 1.3047404063205417) internal successors, (578), 517 states have internal predecessors, (578), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-20 05:41:37,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 638 transitions. [2022-07-20 05:41:37,091 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 638 transitions. Word has length 115 [2022-07-20 05:41:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:37,091 INFO L495 AbstractCegarLoop]: Abstraction has 565 states and 638 transitions. [2022-07-20 05:41:37,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 2.5454545454545454) internal successors, (84), 31 states have internal predecessors, (84), 4 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:41:37,092 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 638 transitions. [2022-07-20 05:41:37,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-20 05:41:37,093 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:37,093 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:37,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:37,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-20 05:41:37,310 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:37,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1031932342, now seen corresponding path program 1 times [2022-07-20 05:41:37,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:37,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011069843] [2022-07-20 05:41:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:37,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:37,329 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:37,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621971339] [2022-07-20 05:41:37,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:37,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:37,331 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:37,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-20 05:41:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:37,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:41:37,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:37,658 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:37,658 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:37,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:37,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011069843] [2022-07-20 05:41:37,659 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:37,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621971339] [2022-07-20 05:41:37,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621971339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:37,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:37,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:41:37,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292877620] [2022-07-20 05:41:37,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:37,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:41:37,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:37,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:41:37,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:41:37,660 INFO L87 Difference]: Start difference. First operand 565 states and 638 transitions. Second operand has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:37,761 INFO L93 Difference]: Finished difference Result 573 states and 649 transitions. [2022-07-20 05:41:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:41:37,762 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 116 [2022-07-20 05:41:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:37,763 INFO L225 Difference]: With dead ends: 573 [2022-07-20 05:41:37,763 INFO L226 Difference]: Without dead ends: 573 [2022-07-20 05:41:37,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:41:37,764 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 134 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:37,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 524 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:41:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-07-20 05:41:37,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 564. [2022-07-20 05:41:37,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 443 states have (on average 1.3024830699774266) internal successors, (577), 516 states have internal predecessors, (577), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-20 05:41:37,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 637 transitions. [2022-07-20 05:41:37,779 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 637 transitions. Word has length 116 [2022-07-20 05:41:37,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:37,779 INFO L495 AbstractCegarLoop]: Abstraction has 564 states and 637 transitions. [2022-07-20 05:41:37,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.0) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:37,780 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 637 transitions. [2022-07-20 05:41:37,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-20 05:41:37,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:37,781 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:37,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-20 05:41:37,994 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1031932343, now seen corresponding path program 1 times [2022-07-20 05:41:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:37,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802924183] [2022-07-20 05:41:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:38,011 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:38,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815488396] [2022-07-20 05:41:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:38,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:38,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:38,019 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:38,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-20 05:41:38,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:38,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1040 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:41:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:38,481 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-20 05:41:38,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:38,530 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:41:38,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-20 05:41:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 64 proven. 106 refuted. 0 times theorem prover too weak. 446 trivial. 0 not checked. [2022-07-20 05:41:38,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:38,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802924183] [2022-07-20 05:41:38,765 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:38,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815488396] [2022-07-20 05:41:38,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815488396] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:41:38,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:41:38,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-20 05:41:38,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937434346] [2022-07-20 05:41:38,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:38,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:41:38,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:41:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:41:38,766 INFO L87 Difference]: Start difference. First operand 564 states and 637 transitions. Second operand has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-20 05:41:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:39,055 INFO L93 Difference]: Finished difference Result 572 states and 648 transitions. [2022-07-20 05:41:39,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:41:39,056 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) Word has length 116 [2022-07-20 05:41:39,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:39,058 INFO L225 Difference]: With dead ends: 572 [2022-07-20 05:41:39,058 INFO L226 Difference]: Without dead ends: 572 [2022-07-20 05:41:39,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:41:39,059 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 200 mSDsluCounter, 2390 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 2612 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:39,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 2612 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:41:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-07-20 05:41:39,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 563. [2022-07-20 05:41:39,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 443 states have (on average 1.3002257336343115) internal successors, (576), 515 states have internal predecessors, (576), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-20 05:41:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 636 transitions. [2022-07-20 05:41:39,076 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 636 transitions. Word has length 116 [2022-07-20 05:41:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:39,076 INFO L495 AbstractCegarLoop]: Abstraction has 563 states and 636 transitions. [2022-07-20 05:41:39,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.705882352941177) internal successors, (80), 16 states have internal predecessors, (80), 3 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (10), 5 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-20 05:41:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 636 transitions. [2022-07-20 05:41:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-20 05:41:39,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:39,077 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:39,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:39,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-20 05:41:39,295 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash -450462856, now seen corresponding path program 1 times [2022-07-20 05:41:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:39,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616844519] [2022-07-20 05:41:39,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:39,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:39,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:39,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057864293] [2022-07-20 05:41:39,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:39,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:39,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:39,345 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:39,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-20 05:41:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:39,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:41:39,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-07-20 05:41:39,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:41:39,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616844519] [2022-07-20 05:41:39,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:39,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057864293] [2022-07-20 05:41:39,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057864293] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:41:39,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:41:39,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:41:39,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550836543] [2022-07-20 05:41:39,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:41:39,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:41:39,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:41:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:41:39,735 INFO L87 Difference]: Start difference. First operand 563 states and 636 transitions. Second operand has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:39,865 INFO L93 Difference]: Finished difference Result 566 states and 641 transitions. [2022-07-20 05:41:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:41:39,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 118 [2022-07-20 05:41:39,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:39,868 INFO L225 Difference]: With dead ends: 566 [2022-07-20 05:41:39,868 INFO L226 Difference]: Without dead ends: 566 [2022-07-20 05:41:39,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:41:39,869 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 64 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:39,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 368 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:41:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-07-20 05:41:39,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 562. [2022-07-20 05:41:39,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 443 states have (on average 1.2979683972911964) internal successors, (575), 514 states have internal predecessors, (575), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-20 05:41:39,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 635 transitions. [2022-07-20 05:41:39,879 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 635 transitions. Word has length 118 [2022-07-20 05:41:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:39,882 INFO L495 AbstractCegarLoop]: Abstraction has 562 states and 635 transitions. [2022-07-20 05:41:39,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 20.5) internal successors, (41), 3 states have internal predecessors, (41), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:41:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 635 transitions. [2022-07-20 05:41:39,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-20 05:41:39,883 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:39,883 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:39,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-20 05:41:40,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-20 05:41:40,108 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:40,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:40,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1373927457, now seen corresponding path program 1 times [2022-07-20 05:41:40,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:40,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121385573] [2022-07-20 05:41:40,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:40,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:40,130 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:40,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1428897696] [2022-07-20 05:41:40,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:40,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:40,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:40,132 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:40,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-20 05:41:40,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:40,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-20 05:41:40,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:40,663 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:40,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:40,771 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:41:40,771 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:41:40,936 INFO L356 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-07-20 05:41:40,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 30 [2022-07-20 05:41:41,075 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-20 05:41:41,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 52 [2022-07-20 05:41:41,348 INFO L356 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2022-07-20 05:41:41,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 62 [2022-07-20 05:41:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 5 proven. 498 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-20 05:41:41,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:41,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:41,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121385573] [2022-07-20 05:41:41,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:41,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428897696] [2022-07-20 05:41:41,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428897696] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:41,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:41,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-07-20 05:41:41,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689642307] [2022-07-20 05:41:41,829 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:41,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 05:41:41,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:41,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 05:41:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2022-07-20 05:41:41,830 INFO L87 Difference]: Start difference. First operand 562 states and 635 transitions. Second operand has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:41:46,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:46,304 INFO L93 Difference]: Finished difference Result 954 states and 1084 transitions. [2022-07-20 05:41:46,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-20 05:41:46,304 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 122 [2022-07-20 05:41:46,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:46,307 INFO L225 Difference]: With dead ends: 954 [2022-07-20 05:41:46,307 INFO L226 Difference]: Without dead ends: 954 [2022-07-20 05:41:46,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 115 SyntacticMatches, 6 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=174, Invalid=1230, Unknown=2, NotChecked=0, Total=1406 [2022-07-20 05:41:46,307 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 138 mSDsluCounter, 2930 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1052 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:46,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 3152 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 564 Invalid, 0 Unknown, 1052 Unchecked, 0.2s Time] [2022-07-20 05:41:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-07-20 05:41:46,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 949. [2022-07-20 05:41:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 791 states have (on average 1.2326169405815424) internal successors, (975), 862 states have internal predecessors, (975), 53 states have call successors, (53), 33 states have call predecessors, (53), 33 states have return successors, (53), 53 states have call predecessors, (53), 53 states have call successors, (53) [2022-07-20 05:41:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1081 transitions. [2022-07-20 05:41:46,316 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1081 transitions. Word has length 122 [2022-07-20 05:41:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:46,317 INFO L495 AbstractCegarLoop]: Abstraction has 949 states and 1081 transitions. [2022-07-20 05:41:46,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 3.5217391304347827) internal successors, (81), 21 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:41:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1081 transitions. [2022-07-20 05:41:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-07-20 05:41:46,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:46,318 INFO L195 NwaCegarLoop]: trace histogram [26, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:46,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-20 05:41:46,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-20 05:41:46,537 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:46,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:46,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1373927456, now seen corresponding path program 1 times [2022-07-20 05:41:46,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:46,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655889413] [2022-07-20 05:41:46,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:46,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:46,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:46,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1592949732] [2022-07-20 05:41:46,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:46,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:46,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:46,584 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:46,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-20 05:41:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:41:47,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 1078 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-20 05:41:47,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:41:47,716 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:41:48,284 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:41:48,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 24 [2022-07-20 05:41:48,310 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:41:48,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:41:48,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:41:48,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-07-20 05:41:48,459 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:41:48,460 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:41:48,523 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 278 proven. 213 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-07-20 05:41:48,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:41:48,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:41:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655889413] [2022-07-20 05:41:48,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:41:48,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592949732] [2022-07-20 05:41:48,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592949732] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:41:48,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:41:48,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-07-20 05:41:48,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574185114] [2022-07-20 05:41:48,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:41:48,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-20 05:41:48,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:41:48,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-20 05:41:48,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2022-07-20 05:41:48,652 INFO L87 Difference]: Start difference. First operand 949 states and 1081 transitions. Second operand has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 23 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:41:50,820 INFO L93 Difference]: Finished difference Result 1290 states and 1521 transitions. [2022-07-20 05:41:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-20 05:41:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 23 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) Word has length 122 [2022-07-20 05:41:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:41:50,824 INFO L225 Difference]: With dead ends: 1290 [2022-07-20 05:41:50,824 INFO L226 Difference]: Without dead ends: 1280 [2022-07-20 05:41:50,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=1339, Unknown=0, NotChecked=0, Total=1482 [2022-07-20 05:41:50,825 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 115 mSDsluCounter, 1262 mSDsCounter, 0 mSdLazyCounter, 3084 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 4397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1298 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-20 05:41:50,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 1450 Invalid, 4397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3084 Invalid, 0 Unknown, 1298 Unchecked, 1.8s Time] [2022-07-20 05:41:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-07-20 05:41:50,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1110. [2022-07-20 05:41:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1110 states, 928 states have (on average 1.2122844827586208) internal successors, (1125), 999 states have internal predecessors, (1125), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-20 05:41:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1294 transitions. [2022-07-20 05:41:50,875 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1294 transitions. Word has length 122 [2022-07-20 05:41:50,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:41:50,875 INFO L495 AbstractCegarLoop]: Abstraction has 1110 states and 1294 transitions. [2022-07-20 05:41:50,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.0384615384615383) internal successors, (79), 23 states have internal predecessors, (79), 2 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:41:50,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1294 transitions. [2022-07-20 05:41:50,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-20 05:41:50,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:41:50,877 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:41:50,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-20 05:41:51,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:51,077 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:41:51,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:41:51,077 INFO L85 PathProgramCache]: Analyzing trace with hash 941894588, now seen corresponding path program 2 times [2022-07-20 05:41:51,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:41:51,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794822998] [2022-07-20 05:41:51,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:41:51,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:41:51,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:41:51,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2010468703] [2022-07-20 05:41:51,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 05:41:51,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:41:51,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:41:51,120 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:41:51,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-20 05:43:03,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 05:43:03,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 05:43:03,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 226 conjunts are in the unsatisfiable core [2022-07-20 05:43:03,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:03,061 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 0 case distinctions, treesize of input 8 treesize of output 7 [2022-07-20 05:43:03,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-20 05:43:04,464 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:43:04,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:43:04,470 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:43:04,968 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:43:04,969 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:43:04,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2022-07-20 05:43:06,057 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:06,057 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 25 [2022-07-20 05:43:06,123 INFO L356 Elim1Store]: treesize reduction 42, result has 27.6 percent of original size [2022-07-20 05:43:06,124 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2022-07-20 05:43:06,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 05:43:07,060 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:07,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 41 [2022-07-20 05:43:07,289 INFO L356 Elim1Store]: treesize reduction 96, result has 27.8 percent of original size [2022-07-20 05:43:07,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 32 treesize of output 57 [2022-07-20 05:43:07,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-20 05:43:07,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:43:07,935 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 37 [2022-07-20 05:43:07,962 INFO L356 Elim1Store]: treesize reduction 44, result has 32.3 percent of original size [2022-07-20 05:43:07,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 31 treesize of output 39 [2022-07-20 05:43:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 35 proven. 436 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2022-07-20 05:43:09,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:43:10,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:10,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794822998] [2022-07-20 05:43:10,559 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:10,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010468703] [2022-07-20 05:43:10,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010468703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:43:10,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:43:10,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-07-20 05:43:10,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012870675] [2022-07-20 05:43:10,560 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:43:10,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 05:43:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 05:43:10,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2022-07-20 05:43:10,562 INFO L87 Difference]: Start difference. First operand 1110 states and 1294 transitions. Second operand has 39 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:43:15,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:15,635 INFO L93 Difference]: Finished difference Result 1221 states and 1426 transitions. [2022-07-20 05:43:15,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-20 05:43:15,638 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 123 [2022-07-20 05:43:15,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:15,641 INFO L225 Difference]: With dead ends: 1221 [2022-07-20 05:43:15,641 INFO L226 Difference]: Without dead ends: 1221 [2022-07-20 05:43:15,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 05:43:15,642 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 114 mSDsluCounter, 2073 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2249 SdHoareTripleChecker+Invalid, 6208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5132 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:15,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2249 Invalid, 6208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1063 Invalid, 0 Unknown, 5132 Unchecked, 3.0s Time] [2022-07-20 05:43:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2022-07-20 05:43:15,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1117. [2022-07-20 05:43:15,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 935 states have (on average 1.2117647058823529) internal successors, (1133), 1006 states have internal predecessors, (1133), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-20 05:43:15,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1302 transitions. [2022-07-20 05:43:15,654 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1302 transitions. Word has length 123 [2022-07-20 05:43:15,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:15,654 INFO L495 AbstractCegarLoop]: Abstraction has 1117 states and 1302 transitions. [2022-07-20 05:43:15,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 6 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-20 05:43:15,654 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1302 transitions. [2022-07-20 05:43:15,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-20 05:43:15,655 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:15,655 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:15,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:15,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-20 05:43:15,855 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:15,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:15,856 INFO L85 PathProgramCache]: Analyzing trace with hash -866038798, now seen corresponding path program 1 times [2022-07-20 05:43:15,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:15,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297017124] [2022-07-20 05:43:15,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:15,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:15,879 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:15,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [10593292] [2022-07-20 05:43:15,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:15,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:15,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:15,896 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:15,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-20 05:43:16,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:16,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:43:16,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:16,418 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:16,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:16,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:16,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297017124] [2022-07-20 05:43:16,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:16,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10593292] [2022-07-20 05:43:16,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10593292] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:16,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:16,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:43:16,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390684765] [2022-07-20 05:43:16,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:16,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:43:16,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:16,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:43:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:43:16,423 INFO L87 Difference]: Start difference. First operand 1117 states and 1302 transitions. Second operand has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:43:16,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:16,558 INFO L93 Difference]: Finished difference Result 1120 states and 1307 transitions. [2022-07-20 05:43:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:43:16,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 124 [2022-07-20 05:43:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:16,561 INFO L225 Difference]: With dead ends: 1120 [2022-07-20 05:43:16,561 INFO L226 Difference]: Without dead ends: 1120 [2022-07-20 05:43:16,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:43:16,562 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 106 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:16,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 521 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:43:16,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-07-20 05:43:16,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1116. [2022-07-20 05:43:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1116 states, 935 states have (on average 1.2106951871657754) internal successors, (1132), 1005 states have internal predecessors, (1132), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-20 05:43:16,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1116 states to 1116 states and 1301 transitions. [2022-07-20 05:43:16,588 INFO L78 Accepts]: Start accepts. Automaton has 1116 states and 1301 transitions. Word has length 124 [2022-07-20 05:43:16,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:16,588 INFO L495 AbstractCegarLoop]: Abstraction has 1116 states and 1301 transitions. [2022-07-20 05:43:16,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 15.333333333333334) internal successors, (46), 4 states have internal predecessors, (46), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:43:16,589 INFO L276 IsEmpty]: Start isEmpty. Operand 1116 states and 1301 transitions. [2022-07-20 05:43:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-20 05:43:16,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:16,589 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:16,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-20 05:43:16,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:16,824 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr23REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash -866038797, now seen corresponding path program 1 times [2022-07-20 05:43:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:16,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047463979] [2022-07-20 05:43:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:16,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:16,850 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:16,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [750598545] [2022-07-20 05:43:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:16,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:16,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:16,868 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:16,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-20 05:43:18,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:18,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1101 conjuncts, 127 conjunts are in the unsatisfiable core [2022-07-20 05:43:18,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:18,211 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2022-07-20 05:43:18,226 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 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-20 05:43:18,668 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:18,669 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:43:18,687 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:43:18,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:43:18,897 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-20 05:43:18,898 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2022-07-20 05:43:18,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:19,095 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:19,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:43:19,126 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-20 05:43:19,126 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 45 [2022-07-20 05:43:21,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:43:21,390 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:21,411 INFO L356 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-07-20 05:43:21,411 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 32 [2022-07-20 05:43:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 183 proven. 276 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-07-20 05:43:21,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:43:21,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:21,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047463979] [2022-07-20 05:43:21,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:21,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750598545] [2022-07-20 05:43:21,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750598545] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:43:21,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:43:21,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-20 05:43:21,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98958877] [2022-07-20 05:43:21,706 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:43:21,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-20 05:43:21,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:21,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-20 05:43:21,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=553, Unknown=1, NotChecked=0, Total=650 [2022-07-20 05:43:21,707 INFO L87 Difference]: Start difference. First operand 1116 states and 1301 transitions. Second operand has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:43:23,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:23,321 INFO L93 Difference]: Finished difference Result 1330 states and 1570 transitions. [2022-07-20 05:43:23,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:43:23,322 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 124 [2022-07-20 05:43:23,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:23,325 INFO L225 Difference]: With dead ends: 1330 [2022-07-20 05:43:23,325 INFO L226 Difference]: Without dead ends: 1330 [2022-07-20 05:43:23,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=124, Invalid=805, Unknown=1, NotChecked=0, Total=930 [2022-07-20 05:43:23,330 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 200 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 2873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 756 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:23,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 821 Invalid, 2873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2080 Invalid, 0 Unknown, 756 Unchecked, 1.4s Time] [2022-07-20 05:43:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2022-07-20 05:43:23,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1124. [2022-07-20 05:43:23,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1124 states, 943 states have (on average 1.2120890774125133) internal successors, (1143), 1013 states have internal predecessors, (1143), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-20 05:43:23,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1312 transitions. [2022-07-20 05:43:23,344 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1312 transitions. Word has length 124 [2022-07-20 05:43:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:23,344 INFO L495 AbstractCegarLoop]: Abstraction has 1124 states and 1312 transitions. [2022-07-20 05:43:23,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 19 states have internal predecessors, (73), 5 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-20 05:43:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1312 transitions. [2022-07-20 05:43:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-20 05:43:23,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:23,346 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:23,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:23,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:23,571 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash 960373107, now seen corresponding path program 1 times [2022-07-20 05:43:23,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:23,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126503973] [2022-07-20 05:43:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:23,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:23,594 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:23,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097788271] [2022-07-20 05:43:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:23,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:23,596 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:23,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-20 05:43:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:24,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:43:24,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:24,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:24,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:24,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126503973] [2022-07-20 05:43:24,080 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:24,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097788271] [2022-07-20 05:43:24,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097788271] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:24,080 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:24,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:43:24,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097229818] [2022-07-20 05:43:24,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:24,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:43:24,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:24,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:43:24,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:43:24,105 INFO L87 Difference]: Start difference. First operand 1124 states and 1312 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:24,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:24,228 INFO L93 Difference]: Finished difference Result 1125 states and 1315 transitions. [2022-07-20 05:43:24,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:43:24,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 126 [2022-07-20 05:43:24,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:24,231 INFO L225 Difference]: With dead ends: 1125 [2022-07-20 05:43:24,231 INFO L226 Difference]: Without dead ends: 1125 [2022-07-20 05:43:24,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:43:24,232 INFO L413 NwaCegarLoop]: 242 mSDtfsCounter, 25 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:24,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 396 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:43:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-07-20 05:43:24,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1123. [2022-07-20 05:43:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1123 states, 943 states have (on average 1.2110286320254506) internal successors, (1142), 1012 states have internal predecessors, (1142), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-20 05:43:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1123 states to 1123 states and 1311 transitions. [2022-07-20 05:43:24,243 INFO L78 Accepts]: Start accepts. Automaton has 1123 states and 1311 transitions. Word has length 126 [2022-07-20 05:43:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:24,244 INFO L495 AbstractCegarLoop]: Abstraction has 1123 states and 1311 transitions. [2022-07-20 05:43:24,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1123 states and 1311 transitions. [2022-07-20 05:43:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-20 05:43:24,245 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:24,245 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:24,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:24,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-07-20 05:43:24,459 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:24,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:24,460 INFO L85 PathProgramCache]: Analyzing trace with hash 960373108, now seen corresponding path program 1 times [2022-07-20 05:43:24,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:24,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112697886] [2022-07-20 05:43:24,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:24,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:24,492 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:24,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677952021] [2022-07-20 05:43:24,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:24,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:24,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:24,494 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:24,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-20 05:43:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:25,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:43:25,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:25,092 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:25,093 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:25,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:25,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112697886] [2022-07-20 05:43:25,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:25,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677952021] [2022-07-20 05:43:25,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677952021] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:25,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:25,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:43:25,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562559504] [2022-07-20 05:43:25,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:25,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:43:25,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:25,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:43:25,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:43:25,094 INFO L87 Difference]: Start difference. First operand 1123 states and 1311 transitions. Second operand has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:25,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:25,329 INFO L93 Difference]: Finished difference Result 1124 states and 1314 transitions. [2022-07-20 05:43:25,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:43:25,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 126 [2022-07-20 05:43:25,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:25,332 INFO L225 Difference]: With dead ends: 1124 [2022-07-20 05:43:25,332 INFO L226 Difference]: Without dead ends: 1124 [2022-07-20 05:43:25,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:43:25,333 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 50 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:25,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 373 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:43:25,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-07-20 05:43:25,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1122. [2022-07-20 05:43:25,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 943 states have (on average 1.2099681866383882) internal successors, (1141), 1011 states have internal predecessors, (1141), 69 states have call successors, (69), 33 states have call predecessors, (69), 41 states have return successors, (100), 77 states have call predecessors, (100), 69 states have call successors, (100) [2022-07-20 05:43:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 1310 transitions. [2022-07-20 05:43:25,345 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 1310 transitions. Word has length 126 [2022-07-20 05:43:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:25,345 INFO L495 AbstractCegarLoop]: Abstraction has 1122 states and 1310 transitions. [2022-07-20 05:43:25,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 24.0) internal successors, (48), 3 states have internal predecessors, (48), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 1310 transitions. [2022-07-20 05:43:25,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-20 05:43:25,346 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:25,346 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:25,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:25,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-20 05:43:25,565 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:25,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:25,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1103242588, now seen corresponding path program 1 times [2022-07-20 05:43:25,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:25,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004007715] [2022-07-20 05:43:25,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:25,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:25,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:25,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1847128977] [2022-07-20 05:43:25,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:25,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:25,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:25,590 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:25,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-20 05:43:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 119 conjunts are in the unsatisfiable core [2022-07-20 05:43:26,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:26,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:43:26,217 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:26,235 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:43:26,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:43:26,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:43:26,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:26,319 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:43:26,320 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:43:26,478 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:26,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:43:26,491 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:26,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2022-07-20 05:43:26,713 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:26,713 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 05:43:26,734 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:26,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2022-07-20 05:43:27,091 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:27,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2022-07-20 05:43:27,117 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:27,117 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 25 [2022-07-20 05:43:27,368 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-20 05:43:27,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 28 [2022-07-20 05:43:27,384 INFO L356 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2022-07-20 05:43:27,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 37 [2022-07-20 05:43:28,241 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 69 proven. 456 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2022-07-20 05:43:28,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:43:29,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:29,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004007715] [2022-07-20 05:43:29,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:29,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847128977] [2022-07-20 05:43:29,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847128977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:43:29,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:43:29,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-07-20 05:43:29,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139168618] [2022-07-20 05:43:29,410 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:43:29,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-20 05:43:29,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-20 05:43:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1413, Unknown=0, NotChecked=0, Total=1560 [2022-07-20 05:43:29,411 INFO L87 Difference]: Start difference. First operand 1122 states and 1310 transitions. Second operand has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 27 states have internal predecessors, (88), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:43:31,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:31,338 INFO L93 Difference]: Finished difference Result 1459 states and 1690 transitions. [2022-07-20 05:43:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-20 05:43:31,338 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 27 states have internal predecessors, (88), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 130 [2022-07-20 05:43:31,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:31,341 INFO L225 Difference]: With dead ends: 1459 [2022-07-20 05:43:31,341 INFO L226 Difference]: Without dead ends: 1459 [2022-07-20 05:43:31,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2022-07-20 05:43:31,342 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 134 mSDsluCounter, 1682 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1866 SdHoareTripleChecker+Invalid, 4998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3353 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:31,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1866 Invalid, 4998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1631 Invalid, 0 Unknown, 3353 Unchecked, 1.4s Time] [2022-07-20 05:43:31,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2022-07-20 05:43:31,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1293. [2022-07-20 05:43:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1293 states, 1097 states have (on average 1.1932543299908842) internal successors, (1309), 1165 states have internal predecessors, (1309), 77 states have call successors, (77), 42 states have call predecessors, (77), 50 states have return successors, (92), 85 states have call predecessors, (92), 77 states have call successors, (92) [2022-07-20 05:43:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1293 states to 1293 states and 1478 transitions. [2022-07-20 05:43:31,356 INFO L78 Accepts]: Start accepts. Automaton has 1293 states and 1478 transitions. Word has length 130 [2022-07-20 05:43:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:31,357 INFO L495 AbstractCegarLoop]: Abstraction has 1293 states and 1478 transitions. [2022-07-20 05:43:31,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.933333333333333) internal successors, (88), 27 states have internal predecessors, (88), 4 states have call successors, (6), 1 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-20 05:43:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1293 states and 1478 transitions. [2022-07-20 05:43:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-20 05:43:31,358 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:31,358 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:31,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:31,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-20 05:43:31,574 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:31,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1103242587, now seen corresponding path program 1 times [2022-07-20 05:43:31,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:31,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819899282] [2022-07-20 05:43:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:31,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:31,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:31,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495268730] [2022-07-20 05:43:31,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:31,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:31,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:31,613 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:31,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-20 05:43:32,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:32,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:43:32,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:32,224 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:43:32,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:32,278 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:43:32,279 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:32,334 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:43:32,334 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:32,395 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:43:32,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:32,481 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:43:32,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:32,536 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:43:32,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:32,604 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:32,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:32,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:32,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819899282] [2022-07-20 05:43:32,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:32,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495268730] [2022-07-20 05:43:32,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495268730] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:32,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:32,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-20 05:43:32,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669152197] [2022-07-20 05:43:32,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:32,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-20 05:43:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-20 05:43:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-20 05:43:32,608 INFO L87 Difference]: Start difference. First operand 1293 states and 1478 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:32,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:32,932 INFO L93 Difference]: Finished difference Result 2444 states and 2793 transitions. [2022-07-20 05:43:32,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:43:32,932 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 130 [2022-07-20 05:43:32,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:32,938 INFO L225 Difference]: With dead ends: 2444 [2022-07-20 05:43:32,938 INFO L226 Difference]: Without dead ends: 2444 [2022-07-20 05:43:32,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 113 SyntacticMatches, 11 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:43:32,938 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 166 mSDsluCounter, 753 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 927 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:32,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 927 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 371 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2022-07-20 05:43:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2444 states. [2022-07-20 05:43:32,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2444 to 2286. [2022-07-20 05:43:32,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2286 states, 1989 states have (on average 1.1714429361488186) internal successors, (2330), 2057 states have internal predecessors, (2330), 132 states have call successors, (132), 80 states have call predecessors, (132), 96 states have return successors, (154), 148 states have call predecessors, (154), 132 states have call successors, (154) [2022-07-20 05:43:32,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2286 states to 2286 states and 2616 transitions. [2022-07-20 05:43:32,960 INFO L78 Accepts]: Start accepts. Automaton has 2286 states and 2616 transitions. Word has length 130 [2022-07-20 05:43:32,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:32,960 INFO L495 AbstractCegarLoop]: Abstraction has 2286 states and 2616 transitions. [2022-07-20 05:43:32,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:32,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2286 states and 2616 transitions. [2022-07-20 05:43:32,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-20 05:43:32,961 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:32,961 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:32,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:33,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:33,175 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:33,176 INFO L85 PathProgramCache]: Analyzing trace with hash -159218072, now seen corresponding path program 1 times [2022-07-20 05:43:33,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:33,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626683050] [2022-07-20 05:43:33,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:33,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:33,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:33,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115333003] [2022-07-20 05:43:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:33,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:33,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:33,227 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:33,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-20 05:43:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:33,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-20 05:43:33,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:33,821 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:33,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:33,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626683050] [2022-07-20 05:43:33,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:33,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115333003] [2022-07-20 05:43:33,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115333003] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:33,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:33,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:43:33,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097690490] [2022-07-20 05:43:33,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:33,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 05:43:33,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 05:43:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 05:43:33,823 INFO L87 Difference]: Start difference. First operand 2286 states and 2616 transitions. Second operand has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:43:33,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:33,948 INFO L93 Difference]: Finished difference Result 2285 states and 2614 transitions. [2022-07-20 05:43:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 05:43:33,948 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 131 [2022-07-20 05:43:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:33,953 INFO L225 Difference]: With dead ends: 2285 [2022-07-20 05:43:33,953 INFO L226 Difference]: Without dead ends: 2285 [2022-07-20 05:43:33,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:43:33,954 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 80 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:33,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 520 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 05:43:33,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2285 states. [2022-07-20 05:43:33,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2285 to 2285. [2022-07-20 05:43:33,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2285 states, 1989 states have (on average 1.1704374057315234) internal successors, (2328), 2056 states have internal predecessors, (2328), 132 states have call successors, (132), 80 states have call predecessors, (132), 96 states have return successors, (154), 148 states have call predecessors, (154), 132 states have call successors, (154) [2022-07-20 05:43:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2285 states to 2285 states and 2614 transitions. [2022-07-20 05:43:33,998 INFO L78 Accepts]: Start accepts. Automaton has 2285 states and 2614 transitions. Word has length 131 [2022-07-20 05:43:33,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:33,998 INFO L495 AbstractCegarLoop]: Abstraction has 2285 states and 2614 transitions. [2022-07-20 05:43:33,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 17.666666666666668) internal successors, (53), 4 states have internal predecessors, (53), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:43:33,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2285 states and 2614 transitions. [2022-07-20 05:43:34,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-20 05:43:34,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:34,000 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:34,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:34,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-20 05:43:34,215 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:34,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:34,216 INFO L85 PathProgramCache]: Analyzing trace with hash -159218071, now seen corresponding path program 1 times [2022-07-20 05:43:34,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:34,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41375066] [2022-07-20 05:43:34,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:34,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:34,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:34,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930872001] [2022-07-20 05:43:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:34,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:34,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:34,246 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:34,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-20 05:43:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:34,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 1147 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-20 05:43:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-07-20 05:43:35,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:43:35,174 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:43:35,175 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-07-20 05:43:35,514 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-07-20 05:43:35,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:35,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41375066] [2022-07-20 05:43:35,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:35,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930872001] [2022-07-20 05:43:35,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930872001] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:43:35,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:43:35,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-20 05:43:35,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110176060] [2022-07-20 05:43:35,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:43:35,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-20 05:43:35,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:35,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-20 05:43:35,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:43:35,517 INFO L87 Difference]: Start difference. First operand 2285 states and 2614 transitions. Second operand has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-20 05:43:35,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:35,762 INFO L93 Difference]: Finished difference Result 2284 states and 2612 transitions. [2022-07-20 05:43:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-20 05:43:35,763 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) Word has length 131 [2022-07-20 05:43:35,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:35,775 INFO L225 Difference]: With dead ends: 2284 [2022-07-20 05:43:35,775 INFO L226 Difference]: Without dead ends: 2284 [2022-07-20 05:43:35,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-20 05:43:35,776 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 281 mSDsluCounter, 2234 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 2453 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:35,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 2453 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:43:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2022-07-20 05:43:35,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2284. [2022-07-20 05:43:35,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2284 states, 1989 states have (on average 1.1694318753142283) internal successors, (2326), 2055 states have internal predecessors, (2326), 132 states have call successors, (132), 80 states have call predecessors, (132), 96 states have return successors, (154), 148 states have call predecessors, (154), 132 states have call successors, (154) [2022-07-20 05:43:35,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2284 states to 2284 states and 2612 transitions. [2022-07-20 05:43:35,799 INFO L78 Accepts]: Start accepts. Automaton has 2284 states and 2612 transitions. Word has length 131 [2022-07-20 05:43:35,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:35,799 INFO L495 AbstractCegarLoop]: Abstraction has 2284 states and 2612 transitions. [2022-07-20 05:43:35,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.588235294117647) internal successors, (112), 16 states have internal predecessors, (112), 3 states have call successors, (11), 1 states have call predecessors, (11), 3 states have return successors, (12), 4 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-20 05:43:35,799 INFO L276 IsEmpty]: Start isEmpty. Operand 2284 states and 2612 transitions. [2022-07-20 05:43:35,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-20 05:43:35,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:35,800 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:35,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:36,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-20 05:43:36,016 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:36,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1610258730, now seen corresponding path program 1 times [2022-07-20 05:43:36,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:36,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599755726] [2022-07-20 05:43:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:36,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:36,058 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:36,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368879006] [2022-07-20 05:43:36,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:36,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:36,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:36,060 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:36,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-20 05:43:36,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:36,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 05:43:36,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:36,650 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:36,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:36,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599755726] [2022-07-20 05:43:36,651 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:36,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368879006] [2022-07-20 05:43:36,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368879006] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:36,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:36,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 05:43:36,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400331264] [2022-07-20 05:43:36,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:36,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 05:43:36,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:36,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 05:43:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:43:36,652 INFO L87 Difference]: Start difference. First operand 2284 states and 2612 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:36,813 INFO L93 Difference]: Finished difference Result 2283 states and 2610 transitions. [2022-07-20 05:43:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 05:43:36,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 133 [2022-07-20 05:43:36,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:36,818 INFO L225 Difference]: With dead ends: 2283 [2022-07-20 05:43:36,818 INFO L226 Difference]: Without dead ends: 2283 [2022-07-20 05:43:36,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 05:43:36,819 INFO L413 NwaCegarLoop]: 229 mSDtfsCounter, 35 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:36,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 379 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:43:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-07-20 05:43:36,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2283. [2022-07-20 05:43:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 1989 states have (on average 1.1684263448969332) internal successors, (2324), 2054 states have internal predecessors, (2324), 132 states have call successors, (132), 80 states have call predecessors, (132), 96 states have return successors, (154), 148 states have call predecessors, (154), 132 states have call successors, (154) [2022-07-20 05:43:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 2610 transitions. [2022-07-20 05:43:36,842 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 2610 transitions. Word has length 133 [2022-07-20 05:43:36,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:36,842 INFO L495 AbstractCegarLoop]: Abstraction has 2283 states and 2610 transitions. [2022-07-20 05:43:36,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:36,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 2610 transitions. [2022-07-20 05:43:36,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-20 05:43:36,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:36,845 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:36,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:37,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-20 05:43:37,071 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:37,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1098524561, now seen corresponding path program 1 times [2022-07-20 05:43:37,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:37,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108848919] [2022-07-20 05:43:37,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:37,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:37,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:37,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153521351] [2022-07-20 05:43:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:37,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:37,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:37,102 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:37,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-20 05:43:37,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:37,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-20 05:43:37,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:37,768 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:37,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108848919] [2022-07-20 05:43:37,768 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:37,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153521351] [2022-07-20 05:43:37,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153521351] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:37,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:37,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:43:37,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314845259] [2022-07-20 05:43:37,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:37,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:43:37,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:37,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:43:37,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:43:37,770 INFO L87 Difference]: Start difference. First operand 2283 states and 2610 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:37,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:37,990 INFO L93 Difference]: Finished difference Result 2399 states and 2746 transitions. [2022-07-20 05:43:37,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:43:37,990 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 137 [2022-07-20 05:43:37,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:37,995 INFO L225 Difference]: With dead ends: 2399 [2022-07-20 05:43:37,995 INFO L226 Difference]: Without dead ends: 2399 [2022-07-20 05:43:37,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:43:37,997 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 618 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:37,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 330 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:43:37,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2022-07-20 05:43:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2332. [2022-07-20 05:43:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2332 states, 2040 states have (on average 1.1813725490196079) internal successors, (2410), 2097 states have internal predecessors, (2410), 132 states have call successors, (132), 80 states have call predecessors, (132), 97 states have return successors, (160), 154 states have call predecessors, (160), 132 states have call successors, (160) [2022-07-20 05:43:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2332 states to 2332 states and 2702 transitions. [2022-07-20 05:43:38,018 INFO L78 Accepts]: Start accepts. Automaton has 2332 states and 2702 transitions. Word has length 137 [2022-07-20 05:43:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:38,018 INFO L495 AbstractCegarLoop]: Abstraction has 2332 states and 2702 transitions. [2022-07-20 05:43:38,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2332 states and 2702 transitions. [2022-07-20 05:43:38,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-20 05:43:38,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:38,022 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:38,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:38,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-07-20 05:43:38,236 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:38,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1098524562, now seen corresponding path program 1 times [2022-07-20 05:43:38,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:38,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195911615] [2022-07-20 05:43:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:38,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:38,287 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:38,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897052618] [2022-07-20 05:43:38,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:38,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:38,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:38,289 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:38,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-20 05:43:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:38,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 05:43:38,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:39,281 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:39,282 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:39,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:39,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195911615] [2022-07-20 05:43:39,282 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:39,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897052618] [2022-07-20 05:43:39,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897052618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:39,282 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:39,282 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 05:43:39,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336855302] [2022-07-20 05:43:39,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:39,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-20 05:43:39,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:39,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-20 05:43:39,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-20 05:43:39,283 INFO L87 Difference]: Start difference. First operand 2332 states and 2702 transitions. Second operand has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:39,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:39,464 INFO L93 Difference]: Finished difference Result 2327 states and 2691 transitions. [2022-07-20 05:43:39,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-20 05:43:39,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 137 [2022-07-20 05:43:39,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:39,468 INFO L225 Difference]: With dead ends: 2327 [2022-07-20 05:43:39,469 INFO L226 Difference]: Without dead ends: 2327 [2022-07-20 05:43:39,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-20 05:43:39,469 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 352 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:39,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 330 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-20 05:43:39,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2327 states. [2022-07-20 05:43:39,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2327 to 2325. [2022-07-20 05:43:39,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2040 states have (on average 1.175) internal successors, (2397), 2090 states have internal predecessors, (2397), 132 states have call successors, (132), 80 states have call predecessors, (132), 97 states have return successors, (160), 154 states have call predecessors, (160), 132 states have call successors, (160) [2022-07-20 05:43:39,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 2689 transitions. [2022-07-20 05:43:39,492 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 2689 transitions. Word has length 137 [2022-07-20 05:43:39,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:39,492 INFO L495 AbstractCegarLoop]: Abstraction has 2325 states and 2689 transitions. [2022-07-20 05:43:39,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:39,492 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 2689 transitions. [2022-07-20 05:43:39,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-20 05:43:39,494 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:39,494 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:39,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:39,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:39,708 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting l0_destroyErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:39,708 INFO L85 PathProgramCache]: Analyzing trace with hash 582971172, now seen corresponding path program 1 times [2022-07-20 05:43:39,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:39,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328886424] [2022-07-20 05:43:39,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:39,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:39,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:39,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686650975] [2022-07-20 05:43:39,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:39,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:39,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:39,739 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:39,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-20 05:43:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:40,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-20 05:43:40,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:40,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:43:40,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2022-07-20 05:43:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:40,854 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:40,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:40,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328886424] [2022-07-20 05:43:40,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:40,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686650975] [2022-07-20 05:43:40,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686650975] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:40,855 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:40,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-20 05:43:40,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100857147] [2022-07-20 05:43:40,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:40,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-20 05:43:40,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:40,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-20 05:43:40,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-20 05:43:40,856 INFO L87 Difference]: Start difference. First operand 2325 states and 2689 transitions. Second operand has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:41,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:41,213 INFO L93 Difference]: Finished difference Result 2640 states and 3055 transitions. [2022-07-20 05:43:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-20 05:43:41,214 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 141 [2022-07-20 05:43:41,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:41,218 INFO L225 Difference]: With dead ends: 2640 [2022-07-20 05:43:41,218 INFO L226 Difference]: Without dead ends: 2640 [2022-07-20 05:43:41,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-20 05:43:41,219 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 785 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:41,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [790 Valid, 1056 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-20 05:43:41,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2640 states. [2022-07-20 05:43:41,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2640 to 2408. [2022-07-20 05:43:41,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2123 states have (on average 1.1978332548280735) internal successors, (2543), 2172 states have internal predecessors, (2543), 132 states have call successors, (132), 81 states have call predecessors, (132), 98 states have return successors, (160), 154 states have call predecessors, (160), 132 states have call successors, (160) [2022-07-20 05:43:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 2835 transitions. [2022-07-20 05:43:41,267 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 2835 transitions. Word has length 141 [2022-07-20 05:43:41,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:41,268 INFO L495 AbstractCegarLoop]: Abstraction has 2408 states and 2835 transitions. [2022-07-20 05:43:41,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 8.857142857142858) internal successors, (62), 7 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-20 05:43:41,268 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 2835 transitions. [2022-07-20 05:43:41,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-07-20 05:43:41,269 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:41,269 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:41,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:41,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:41,483 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting l0_destroyErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:41,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:41,483 INFO L85 PathProgramCache]: Analyzing trace with hash 582971173, now seen corresponding path program 1 times [2022-07-20 05:43:41,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:41,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15190030] [2022-07-20 05:43:41,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:41,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:41,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:41,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104612846] [2022-07-20 05:43:41,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:41,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:41,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:41,511 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:41,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-20 05:43:42,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:42,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-20 05:43:42,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:42,824 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:43:42,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:43:42,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2022-07-20 05:43:42,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-07-20 05:43:42,946 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2022-07-20 05:43:42,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 05:43:42,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:42,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15190030] [2022-07-20 05:43:42,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:42,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104612846] [2022-07-20 05:43:42,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104612846] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 05:43:42,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 05:43:42,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-20 05:43:42,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306604861] [2022-07-20 05:43:42,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 05:43:42,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 05:43:42,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:42,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 05:43:42,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-07-20 05:43:42,947 INFO L87 Difference]: Start difference. First operand 2408 states and 2835 transitions. Second operand has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:43:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:43,617 INFO L93 Difference]: Finished difference Result 2674 states and 3181 transitions. [2022-07-20 05:43:43,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 05:43:43,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 141 [2022-07-20 05:43:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:43,622 INFO L225 Difference]: With dead ends: 2674 [2022-07-20 05:43:43,622 INFO L226 Difference]: Without dead ends: 2674 [2022-07-20 05:43:43,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2022-07-20 05:43:43,627 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 921 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 921 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:43,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [921 Valid, 887 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 05:43:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2674 states. [2022-07-20 05:43:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2674 to 2593. [2022-07-20 05:43:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2593 states, 2307 states have (on average 1.246207195491981) internal successors, (2875), 2357 states have internal predecessors, (2875), 132 states have call successors, (132), 81 states have call predecessors, (132), 99 states have return successors, (160), 154 states have call predecessors, (160), 132 states have call successors, (160) [2022-07-20 05:43:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2593 states to 2593 states and 3167 transitions. [2022-07-20 05:43:43,651 INFO L78 Accepts]: Start accepts. Automaton has 2593 states and 3167 transitions. Word has length 141 [2022-07-20 05:43:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:43,651 INFO L495 AbstractCegarLoop]: Abstraction has 2593 states and 3167 transitions. [2022-07-20 05:43:43,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 6.888888888888889) internal successors, (62), 9 states have internal predecessors, (62), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-20 05:43:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 2593 states and 3167 transitions. [2022-07-20 05:43:43,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 05:43:43,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:43,652 INFO L195 NwaCegarLoop]: trace histogram [36, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:43,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:43,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-07-20 05:43:43,874 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:43,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:43,874 INFO L85 PathProgramCache]: Analyzing trace with hash -750138260, now seen corresponding path program 1 times [2022-07-20 05:43:43,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:43,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293429548] [2022-07-20 05:43:43,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:43,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:43,906 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:43,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743878231] [2022-07-20 05:43:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:43,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:43,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:43,925 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:43,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-20 05:43:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:44,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-20 05:43:44,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:44,668 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:43:44,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:44,719 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-20 05:43:44,719 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-20 05:43:44,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:43:44,921 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-20 05:43:44,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 11 [2022-07-20 05:43:44,943 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 481 proven. 6 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2022-07-20 05:43:44,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:44,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293429548] [2022-07-20 05:43:44,944 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:44,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743878231] [2022-07-20 05:43:44,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743878231] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 05:43:44,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-20 05:43:44,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-07-20 05:43:44,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272131286] [2022-07-20 05:43:44,945 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-20 05:43:44,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-20 05:43:44,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:44,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-20 05:43:44,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-20 05:43:44,946 INFO L87 Difference]: Start difference. First operand 2593 states and 3167 transitions. Second operand has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-20 05:43:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:45,080 INFO L93 Difference]: Finished difference Result 2592 states and 3151 transitions. [2022-07-20 05:43:45,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-20 05:43:45,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 142 [2022-07-20 05:43:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:45,084 INFO L225 Difference]: With dead ends: 2592 [2022-07-20 05:43:45,084 INFO L226 Difference]: Without dead ends: 2592 [2022-07-20 05:43:45,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 267 SyntacticMatches, 9 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-20 05:43:45,085 INFO L413 NwaCegarLoop]: 237 mSDtfsCounter, 191 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 1317 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:45,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 1317 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 394 Unchecked, 0.1s Time] [2022-07-20 05:43:45,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2022-07-20 05:43:45,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2592. [2022-07-20 05:43:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2592 states, 2307 states have (on average 1.2392717815344603) internal successors, (2859), 2356 states have internal predecessors, (2859), 132 states have call successors, (132), 81 states have call predecessors, (132), 99 states have return successors, (160), 154 states have call predecessors, (160), 132 states have call successors, (160) [2022-07-20 05:43:45,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2592 states to 2592 states and 3151 transitions. [2022-07-20 05:43:45,106 INFO L78 Accepts]: Start accepts. Automaton has 2592 states and 3151 transitions. Word has length 142 [2022-07-20 05:43:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:45,106 INFO L495 AbstractCegarLoop]: Abstraction has 2592 states and 3151 transitions. [2022-07-20 05:43:45,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.888888888888889) internal successors, (53), 9 states have internal predecessors, (53), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-20 05:43:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2592 states and 3151 transitions. [2022-07-20 05:43:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-07-20 05:43:45,107 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:45,107 INFO L195 NwaCegarLoop]: trace histogram [36, 8, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:45,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:45,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-20 05:43:45,328 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:45,328 INFO L85 PathProgramCache]: Analyzing trace with hash -750138259, now seen corresponding path program 1 times [2022-07-20 05:43:45,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:45,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188333703] [2022-07-20 05:43:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:45,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:45,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:45,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559410818] [2022-07-20 05:43:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:45,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:45,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:45,359 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:45,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-20 05:43:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:46,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-20 05:43:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:46,384 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-20 05:43:46,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-07-20 05:43:46,392 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:46,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:43:46,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-07-20 05:43:46,519 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-20 05:43:46,519 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2022-07-20 05:43:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1177 backedges. 503 proven. 196 refuted. 0 times theorem prover too weak. 478 trivial. 0 not checked. [2022-07-20 05:43:46,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:43:46,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 05:43:46,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188333703] [2022-07-20 05:43:46,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-20 05:43:46,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559410818] [2022-07-20 05:43:46,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559410818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 05:43:46,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-20 05:43:46,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-20 05:43:46,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667669601] [2022-07-20 05:43:46,672 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-20 05:43:46,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 05:43:46,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 05:43:46,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 05:43:46,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-07-20 05:43:46,673 INFO L87 Difference]: Start difference. First operand 2592 states and 3151 transitions. Second operand has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 05:43:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 05:43:47,859 INFO L93 Difference]: Finished difference Result 2907 states and 3550 transitions. [2022-07-20 05:43:47,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-20 05:43:47,860 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 142 [2022-07-20 05:43:47,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 05:43:47,865 INFO L225 Difference]: With dead ends: 2907 [2022-07-20 05:43:47,865 INFO L226 Difference]: Without dead ends: 2907 [2022-07-20 05:43:47,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=918, Unknown=0, NotChecked=0, Total=1056 [2022-07-20 05:43:47,868 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 445 mSDsluCounter, 1572 mSDsCounter, 0 mSdLazyCounter, 1930 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 1787 SdHoareTripleChecker+Invalid, 4312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2249 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-20 05:43:47,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 1787 Invalid, 4312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1930 Invalid, 0 Unknown, 2249 Unchecked, 1.0s Time] [2022-07-20 05:43:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2907 states. [2022-07-20 05:43:47,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2907 to 2591. [2022-07-20 05:43:47,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2591 states, 2307 states have (on average 1.2323363675769397) internal successors, (2843), 2355 states have internal predecessors, (2843), 132 states have call successors, (132), 81 states have call predecessors, (132), 99 states have return successors, (160), 154 states have call predecessors, (160), 132 states have call successors, (160) [2022-07-20 05:43:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2591 states to 2591 states and 3135 transitions. [2022-07-20 05:43:47,913 INFO L78 Accepts]: Start accepts. Automaton has 2591 states and 3135 transitions. Word has length 142 [2022-07-20 05:43:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 05:43:47,913 INFO L495 AbstractCegarLoop]: Abstraction has 2591 states and 3135 transitions. [2022-07-20 05:43:47,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 18 states have internal predecessors, (62), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-20 05:43:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 2591 states and 3135 transitions. [2022-07-20 05:43:47,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-07-20 05:43:47,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 05:43:47,915 INFO L195 NwaCegarLoop]: trace histogram [27, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 05:43:47,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-20 05:43:48,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-20 05:43:48,135 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting l0_destroyErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 84 more)] === [2022-07-20 05:43:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 05:43:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1553394941, now seen corresponding path program 1 times [2022-07-20 05:43:48,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 05:43:48,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392849282] [2022-07-20 05:43:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:48,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 05:43:48,163 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-20 05:43:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913163415] [2022-07-20 05:43:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 05:43:48,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 05:43:48,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 05:43:48,165 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-20 05:43:48,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-20 05:43:48,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 05:43:49,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 1229 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-20 05:43:49,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 05:43:49,153 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-20 05:43:49,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-20 05:43:49,688 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-20 05:43:49,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 05:43:49,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-20 05:43:49,749 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 05:43:49,754 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-20 05:43:49,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-20 05:43:49,827 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-20 05:43:49,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 16 [2022-07-20 05:43:49,847 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-07-20 05:43:49,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 05:43:49,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 80 [2022-07-20 05:44:00,696 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_13085 Int) (v_arrayElimCell_211 Int)) (let ((.cse0 (let ((.cse1 (let ((.cse2 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_l0_insert_~item~4#1.base|) |c_ULTIMATE.start_l0_insert_~item~4#1.offset| v_ArrVal_13085)))) (store .cse2 |c_ULTIMATE.start_l0_insert_~list#1.base| (store (select .cse2 |c_ULTIMATE.start_l0_insert_~list#1.base|) |c_ULTIMATE.start_l0_insert_~list#1.offset| |c_ULTIMATE.start_l0_insert_~item~4#1.base|))))) (select .cse1 (select (select .cse1 |c_~#list~0.base|) |c_~#list~0.offset|))))) (or (= (select |c_#valid| (select .cse0 (+ v_arrayElimCell_211 4))) 1) (and (= (select |c_#valid| (select .cse0 (+ |c_ULTIMATE.start_l0_insert_~item~4#1.offset| 4))) 1) (= |c_~#list~0.offset| |c_ULTIMATE.start_l0_insert_~list#1.offset|) (= |c_~#list~0.base| |c_ULTIMATE.start_l0_insert_~list#1.base|))))) is different from false [2022-07-20 05:44:01,185 INFO L356 Elim1Store]: treesize reduction 196, result has 54.3 percent of original size [2022-07-20 05:44:01,186 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 10 new quantified variables, introduced 36 case distinctions, treesize of input 224229 treesize of output 215249 [2022-07-20 05:44:13,189 WARN L233 SmtUtils]: Spent 12.00s on a formula simplification. DAG size of input: 706 DAG size of output: 702 (called from [L 813] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)