./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/test-0234-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 791161d1 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-0234-2.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 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-23 05:53:32,455 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-23 05:53:32,456 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-23 05:53:32,492 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-23 05:53:32,492 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-23 05:53:32,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-23 05:53:32,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-23 05:53:32,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-23 05:53:32,500 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-23 05:53:32,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-23 05:53:32,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-23 05:53:32,502 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-23 05:53:32,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-23 05:53:32,504 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-23 05:53:32,505 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-23 05:53:32,506 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-23 05:53:32,506 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-23 05:53:32,507 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-23 05:53:32,509 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-23 05:53:32,510 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-23 05:53:32,511 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-23 05:53:32,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-23 05:53:32,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-23 05:53:32,523 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-23 05:53:32,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-23 05:53:32,531 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-23 05:53:32,531 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-23 05:53:32,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-23 05:53:32,532 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-23 05:53:32,533 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-23 05:53:32,534 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-23 05:53:32,534 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-23 05:53:32,534 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-23 05:53:32,535 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-23 05:53:32,536 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-23 05:53:32,537 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-23 05:53:32,537 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-23 05:53:32,538 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-23 05:53:32,538 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-23 05:53:32,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-23 05:53:32,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-23 05:53:32,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-23 05:53:32,551 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-07-23 05:53:32,573 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-23 05:53:32,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-23 05:53:32,574 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-23 05:53:32,574 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-23 05:53:32,575 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-23 05:53:32,575 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-23 05:53:32,576 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-23 05:53:32,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-23 05:53:32,576 INFO L138 SettingsManager]: * Use SBE=true [2022-07-23 05:53:32,577 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-23 05:53:32,577 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-23 05:53:32,577 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-07-23 05:53:32,578 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-23 05:53:32,578 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-23 05:53:32,578 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-23 05:53:32,578 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-07-23 05:53:32,578 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-07-23 05:53:32,580 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-07-23 05:53:32,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-23 05:53:32,580 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-23 05:53:32,580 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-23 05:53:32,580 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-23 05:53:32,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-23 05:53:32,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-23 05:53:32,581 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-23 05:53:32,581 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:53:32,581 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-23 05:53:32,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-23 05:53:32,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-23 05:53:32,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-23 05:53:32,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2022-07-23 05:53:32,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-23 05:53:32,815 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-23 05:53:32,817 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-23 05:53:32,818 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-23 05:53:32,819 INFO L275 PluginConnector]: CDTParser initialized [2022-07-23 05:53:32,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0234-2.i [2022-07-23 05:53:32,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77a272589/61c74060889448cbb45c628bfd420cd1/FLAGd0ce8f242 [2022-07-23 05:53:33,328 INFO L306 CDTParser]: Found 1 translation units. [2022-07-23 05:53:33,328 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0234-2.i [2022-07-23 05:53:33,346 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77a272589/61c74060889448cbb45c628bfd420cd1/FLAGd0ce8f242 [2022-07-23 05:53:33,361 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77a272589/61c74060889448cbb45c628bfd420cd1 [2022-07-23 05:53:33,363 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-23 05:53:33,364 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-23 05:53:33,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-23 05:53:33,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-23 05:53:33,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-23 05:53:33,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:33,371 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e3dbfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33, skipping insertion in model container [2022-07-23 05:53:33,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:33,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-23 05:53:33,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-23 05:53:33,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:53:33,830 INFO L203 MainTranslator]: Completed pre-run [2022-07-23 05:53:33,889 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-23 05:53:33,928 INFO L208 MainTranslator]: Completed translation [2022-07-23 05:53:33,929 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33 WrapperNode [2022-07-23 05:53:33,929 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-23 05:53:33,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-23 05:53:33,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-23 05:53:33,931 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-23 05:53:33,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:33,967 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:33,994 INFO L137 Inliner]: procedures = 188, calls = 58, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 197 [2022-07-23 05:53:33,994 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-23 05:53:33,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-23 05:53:33,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-23 05:53:33,995 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-23 05:53:34,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:34,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:34,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:34,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:34,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:34,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:34,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:34,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-23 05:53:34,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-23 05:53:34,034 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-23 05:53:34,034 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-23 05:53:34,035 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (1/1) ... [2022-07-23 05:53:34,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-23 05:53:34,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:53:34,067 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) [2022-07-23 05:53:34,069 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 [2022-07-23 05:53:34,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-23 05:53:34,102 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-23 05:53:34,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-23 05:53:34,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-23 05:53:34,103 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2022-07-23 05:53:34,103 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2022-07-23 05:53:34,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-23 05:53:34,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-23 05:53:34,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-23 05:53:34,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-23 05:53:34,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-23 05:53:34,274 INFO L234 CfgBuilder]: Building ICFG [2022-07-23 05:53:34,276 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-23 05:53:34,675 INFO L275 CfgBuilder]: Performing block encoding [2022-07-23 05:53:34,682 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-23 05:53:34,688 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2022-07-23 05:53:34,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:53:34 BoogieIcfgContainer [2022-07-23 05:53:34,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-23 05:53:34,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-23 05:53:34,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-23 05:53:34,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-23 05:53:34,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.07 05:53:33" (1/3) ... [2022-07-23 05:53:34,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f1d1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:53:34, skipping insertion in model container [2022-07-23 05:53:34,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.07 05:53:33" (2/3) ... [2022-07-23 05:53:34,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53f1d1f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.07 05:53:34, skipping insertion in model container [2022-07-23 05:53:34,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.07 05:53:34" (3/3) ... [2022-07-23 05:53:34,703 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2022-07-23 05:53:34,717 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-23 05:53:34,717 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2022-07-23 05:53:34,775 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-23 05:53:34,782 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@48cf7b21, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6fbbe8c6 [2022-07-23 05:53:34,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2022-07-23 05:53:34,788 INFO L276 IsEmpty]: Start isEmpty. Operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 05:53:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-07-23 05:53:34,794 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:53:34,795 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-07-23 05:53:34,796 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:53:34,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:53:34,801 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2022-07-23 05:53:34,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:53:34,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559038945] [2022-07-23 05:53:34,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:34,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:53:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:53:34,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:53:34,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559038945] [2022-07-23 05:53:34,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559038945] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:53:34,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:53:34,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:53:34,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562572577] [2022-07-23 05:53:34,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:53:34,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-23 05:53:34,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:53:34,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-23 05:53:34,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-23 05:53:34,981 INFO L87 Difference]: Start difference. First operand has 182 states, 104 states have (on average 1.8846153846153846) internal successors, (196), 174 states have internal predecessors, (196), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) 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) [2022-07-23 05:53:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:53:35,009 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2022-07-23 05:53:35,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-23 05:53:35,013 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 [2022-07-23 05:53:35,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:53:35,024 INFO L225 Difference]: With dead ends: 182 [2022-07-23 05:53:35,024 INFO L226 Difference]: Without dead ends: 180 [2022-07-23 05:53:35,026 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 [2022-07-23 05:53:35,030 INFO L413 NwaCegarLoop]: 197 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, 197 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 [2022-07-23 05:53:35,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:53:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-07-23 05:53:35,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-07-23 05:53:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 103 states have (on average 1.7766990291262137) internal successors, (183), 172 states have internal predecessors, (183), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 05:53:35,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2022-07-23 05:53:35,090 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 4 [2022-07-23 05:53:35,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:53:35,090 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2022-07-23 05:53:35,091 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) [2022-07-23 05:53:35,091 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2022-07-23 05:53:35,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-23 05:53:35,092 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:53:35,092 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-23 05:53:35,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-23 05:53:35,094 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:53:35,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:53:35,094 INFO L85 PathProgramCache]: Analyzing trace with hash 889833681, now seen corresponding path program 1 times [2022-07-23 05:53:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:53:35,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129781424] [2022-07-23 05:53:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:35,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:53:35,116 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:53:35,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472865928] [2022-07-23 05:53:35,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:35,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:53:35,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:53:35,120 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) [2022-07-23 05:53:35,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-23 05:53:35,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:35,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-23 05:53:35,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:53:35,272 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 [2022-07-23 05:53:35,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:53:35,287 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:53:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:53:35,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129781424] [2022-07-23 05:53:35,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:53:35,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472865928] [2022-07-23 05:53:35,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472865928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:53:35,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:53:35,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:53:35,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118891226] [2022-07-23 05:53:35,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:53:35,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:53:35,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:53:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:53:35,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:53:35,292 INFO L87 Difference]: Start difference. First operand 180 states and 195 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) [2022-07-23 05:53:35,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:53:35,430 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2022-07-23 05:53:35,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:53:35,431 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 [2022-07-23 05:53:35,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:53:35,432 INFO L225 Difference]: With dead ends: 179 [2022-07-23 05:53:35,432 INFO L226 Difference]: Without dead ends: 179 [2022-07-23 05:53:35,433 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 [2022-07-23 05:53:35,434 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 9 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:53:35,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 302 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:53:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-23 05:53:35,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-07-23 05:53:35,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 103 states have (on average 1.766990291262136) internal successors, (182), 171 states have internal predecessors, (182), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 05:53:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2022-07-23 05:53:35,444 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 6 [2022-07-23 05:53:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:53:35,444 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2022-07-23 05:53:35,445 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) [2022-07-23 05:53:35,445 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2022-07-23 05:53:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-23 05:53:35,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:53:35,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-23 05:53:35,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-23 05:53:35,670 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 [2022-07-23 05:53:35,670 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:53:35,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:53:35,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1815040656, now seen corresponding path program 1 times [2022-07-23 05:53:35,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:53:35,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505763140] [2022-07-23 05:53:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:35,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:53:35,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:53:35,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578724697] [2022-07-23 05:53:35,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:35,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:53:35,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:53:35,690 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) [2022-07-23 05:53:35,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-23 05:53:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:35,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-23 05:53:35,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:53:35,828 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 [2022-07-23 05:53:35,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-23 05:53:35,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:53:35,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:53:35,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505763140] [2022-07-23 05:53:35,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:53:35,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578724697] [2022-07-23 05:53:35,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578724697] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:53:35,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:53:35,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:53:35,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316691976] [2022-07-23 05:53:35,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:53:35,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:53:35,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:53:35,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:53:35,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:53:35,913 INFO L87 Difference]: Start difference. First operand 179 states and 194 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) [2022-07-23 05:53:35,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:53:35,920 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2022-07-23 05:53:35,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:53:35,920 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 [2022-07-23 05:53:35,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:53:35,921 INFO L225 Difference]: With dead ends: 178 [2022-07-23 05:53:35,922 INFO L226 Difference]: Without dead ends: 178 [2022-07-23 05:53:35,922 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 [2022-07-23 05:53:35,923 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 0 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:53:35,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 325 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2022-07-23 05:53:35,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-07-23 05:53:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-07-23 05:53:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 103 states have (on average 1.7572815533980584) internal successors, (181), 170 states have internal predecessors, (181), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 05:53:35,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2022-07-23 05:53:35,935 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 7 [2022-07-23 05:53:35,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:53:35,936 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2022-07-23 05:53:35,936 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) [2022-07-23 05:53:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2022-07-23 05:53:35,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:53:35,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:53:35,938 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] [2022-07-23 05:53:35,955 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-23 05:53:36,139 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 [2022-07-23 05:53:36,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:53:36,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:53:36,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051478, now seen corresponding path program 1 times [2022-07-23 05:53:36,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:53:36,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520278839] [2022-07-23 05:53:36,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:36,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:53:36,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:53:36,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1103104600] [2022-07-23 05:53:36,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:36,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:53:36,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:53:36,163 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) [2022-07-23 05:53:36,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-23 05:53:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:36,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 05:53:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:53:36,494 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 05:53:36,494 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 [2022-07-23 05:53:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-23 05:53:36,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:53:36,709 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:53:36,709 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 [2022-07-23 05:53:36,725 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-23 05:53:36,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:53:36,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520278839] [2022-07-23 05:53:36,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:53:36,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103104600] [2022-07-23 05:53:36,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103104600] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:53:36,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:53:36,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-23 05:53:36,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124895038] [2022-07-23 05:53:36,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:53:36,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:53:36,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:53:36,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:53:36,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:53:36,744 INFO L87 Difference]: Start difference. First operand 178 states and 193 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) [2022-07-23 05:53:45,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:53:45,277 INFO L93 Difference]: Finished difference Result 223 states and 243 transitions. [2022-07-23 05:53:45,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-23 05:53:45,278 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 [2022-07-23 05:53:45,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:53:45,281 INFO L225 Difference]: With dead ends: 223 [2022-07-23 05:53:45,281 INFO L226 Difference]: Without dead ends: 223 [2022-07-23 05:53:45,281 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 [2022-07-23 05:53:45,282 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 125 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1284 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:53:45,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1284 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 590 Invalid, 0 Unknown, 300 Unchecked, 0.3s Time] [2022-07-23 05:53:45,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-23 05:53:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 187. [2022-07-23 05:53:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 112 states have (on average 1.7053571428571428) internal successors, (191), 177 states have internal predecessors, (191), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-23 05:53:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2022-07-23 05:53:45,294 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 73 [2022-07-23 05:53:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:53:45,294 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2022-07-23 05:53:45,295 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) [2022-07-23 05:53:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2022-07-23 05:53:45,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-23 05:53:45,297 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:53:45,297 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] [2022-07-23 05:53:45,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-23 05:53:45,507 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 [2022-07-23 05:53:45,508 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:53:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:53:45,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051477, now seen corresponding path program 1 times [2022-07-23 05:53:45,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:53:45,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570145280] [2022-07-23 05:53:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:45,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:53:45,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:53:45,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564674637] [2022-07-23 05:53:45,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:45,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:53:45,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:53:45,530 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) [2022-07-23 05:53:45,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-23 05:53:45,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:45,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-23 05:53:45,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:53:45,727 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 [2022-07-23 05:53:46,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:53:46,193 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 [2022-07-23 05:53:46,203 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:53:46,203 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 [2022-07-23 05:53:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-23 05:53:46,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:53:48,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:53:48,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570145280] [2022-07-23 05:53:48,375 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:53:48,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564674637] [2022-07-23 05:53:48,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564674637] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:53:48,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:53:48,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-07-23 05:53:48,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405640611] [2022-07-23 05:53:48,375 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:53:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:53:48,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:53:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:53:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:53:48,377 INFO L87 Difference]: Start difference. First operand 187 states and 204 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) [2022-07-23 05:53:49,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:53:49,028 INFO L93 Difference]: Finished difference Result 186 states and 202 transitions. [2022-07-23 05:53:49,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-23 05:53:49,029 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 [2022-07-23 05:53:49,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:53:49,030 INFO L225 Difference]: With dead ends: 186 [2022-07-23 05:53:49,030 INFO L226 Difference]: Without dead ends: 186 [2022-07-23 05:53:49,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:53:49,031 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 2 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1119 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 311 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:53:49,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1119 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 516 Invalid, 0 Unknown, 311 Unchecked, 0.5s Time] [2022-07-23 05:53:49,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-23 05:53:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-07-23 05:53:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 112 states have (on average 1.6875) internal successors, (189), 176 states have internal predecessors, (189), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-23 05:53:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 202 transitions. [2022-07-23 05:53:49,039 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 202 transitions. Word has length 73 [2022-07-23 05:53:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:53:49,040 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 202 transitions. [2022-07-23 05:53:49,040 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) [2022-07-23 05:53:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 202 transitions. [2022-07-23 05:53:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-23 05:53:49,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:53:49,042 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] [2022-07-23 05:53:49,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-23 05:53:49,255 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 [2022-07-23 05:53:49,256 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:53:49,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:53:49,256 INFO L85 PathProgramCache]: Analyzing trace with hash 120292531, now seen corresponding path program 1 times [2022-07-23 05:53:49,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:53:49,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422913819] [2022-07-23 05:53:49,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:49,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:53:49,276 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:53:49,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783520140] [2022-07-23 05:53:49,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:49,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:53:49,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:53:49,285 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) [2022-07-23 05:53:49,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-23 05:53:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:49,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-23 05:53:49,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:53:49,592 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 05:53:49,592 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 [2022-07-23 05:53:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-23 05:53:49,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:53:49,802 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:53:49,802 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 [2022-07-23 05:53:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-23 05:53:49,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:53:49,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422913819] [2022-07-23 05:53:49,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:53:49,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783520140] [2022-07-23 05:53:49,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783520140] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:53:49,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:53:49,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2022-07-23 05:53:49,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916904295] [2022-07-23 05:53:49,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:53:49,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:53:49,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:53:49,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:53:49,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-07-23 05:53:49,833 INFO L87 Difference]: Start difference. First operand 186 states and 202 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) [2022-07-23 05:53:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:53:50,163 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2022-07-23 05:53:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:53:50,164 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 [2022-07-23 05:53:50,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:53:50,165 INFO L225 Difference]: With dead ends: 220 [2022-07-23 05:53:50,165 INFO L226 Difference]: Without dead ends: 220 [2022-07-23 05:53:50,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 134 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:53:50,184 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 108 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:53:50,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1272 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 554 Invalid, 0 Unknown, 193 Unchecked, 0.3s Time] [2022-07-23 05:53:50,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-07-23 05:53:50,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2022-07-23 05:53:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 111 states have (on average 1.6846846846846846) internal successors, (187), 175 states have internal predecessors, (187), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-07-23 05:53:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2022-07-23 05:53:50,192 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 74 [2022-07-23 05:53:50,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:53:50,192 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2022-07-23 05:53:50,192 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) [2022-07-23 05:53:50,192 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2022-07-23 05:53:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-23 05:53:50,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:53:50,194 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] [2022-07-23 05:53:50,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-23 05:53:50,395 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 [2022-07-23 05:53:50,395 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:53:50,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:53:50,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639435, now seen corresponding path program 1 times [2022-07-23 05:53:50,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:53:50,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961242499] [2022-07-23 05:53:50,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:50,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:53:50,417 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:53:50,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1836365122] [2022-07-23 05:53:50,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:50,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:53:50,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:53:50,425 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) [2022-07-23 05:53:50,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-23 05:53:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:53:50,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:53:50,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:53:50,732 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 05:53:50,732 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 [2022-07-23 05:53:50,804 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 05:53:50,805 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 [2022-07-23 05:53:50,819 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-23 05:53:50,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:53:51,129 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:53:51,130 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 [2022-07-23 05:53:51,143 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-23 05:53:51,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:53:51,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961242499] [2022-07-23 05:53:51,144 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:53:51,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836365122] [2022-07-23 05:53:51,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836365122] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:53:51,144 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:53:51,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-23 05:53:51,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188500607] [2022-07-23 05:53:51,144 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:53:51,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 05:53:51,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:53:51,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 05:53:51,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:53:51,146 INFO L87 Difference]: Start difference. First operand 184 states and 200 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) [2022-07-23 05:53:59,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:53:59,675 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2022-07-23 05:53:59,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:53:59,676 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 [2022-07-23 05:53:59,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:53:59,678 INFO L225 Difference]: With dead ends: 243 [2022-07-23 05:53:59,678 INFO L226 Difference]: Without dead ends: 243 [2022-07-23 05:53:59,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:53:59,679 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 203 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:53:59,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 1230 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 664 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2022-07-23 05:53:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-07-23 05:53:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 208. [2022-07-23 05:53:59,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 132 states have (on average 1.5909090909090908) internal successors, (210), 195 states have internal predecessors, (210), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (11), 8 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-23 05:53:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 229 transitions. [2022-07-23 05:53:59,693 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 229 transitions. Word has length 75 [2022-07-23 05:53:59,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:53:59,695 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 229 transitions. [2022-07-23 05:53:59,695 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) [2022-07-23 05:53:59,696 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 229 transitions. [2022-07-23 05:53:59,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-23 05:53:59,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:53:59,700 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] [2022-07-23 05:53:59,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-23 05:53:59,925 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 [2022-07-23 05:53:59,926 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:53:59,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:53:59,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639436, now seen corresponding path program 1 times [2022-07-23 05:53:59,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:53:59,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184360243] [2022-07-23 05:53:59,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:59,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:53:59,946 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:53:59,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840862522] [2022-07-23 05:53:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:53:59,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:53:59,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:53:59,952 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) [2022-07-23 05:53:59,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-23 05:54:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:54:00,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-23 05:54:00,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:00,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:54:00,843 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 14 treesize of output 16 [2022-07-23 05:54:00,863 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:54:00,863 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 [2022-07-23 05:54:01,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:54:01,056 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 14 treesize of output 16 [2022-07-23 05:54:01,072 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-23 05:54:01,073 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 [2022-07-23 05:54:01,153 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-23 05:54:01,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:01,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184360243] [2022-07-23 05:54:01,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840862522] [2022-07-23 05:54:01,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840862522] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:54:01,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:54:01,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-07-23 05:54:01,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087130373] [2022-07-23 05:54:01,288 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:01,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 05:54:01,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 05:54:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:54:01,289 INFO L87 Difference]: Start difference. First operand 208 states and 229 transitions. Second operand has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2022-07-23 05:54:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:01,592 INFO L93 Difference]: Finished difference Result 222 states and 252 transitions. [2022-07-23 05:54:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:54:01,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 [2022-07-23 05:54:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:01,595 INFO L225 Difference]: With dead ends: 222 [2022-07-23 05:54:01,595 INFO L226 Difference]: Without dead ends: 222 [2022-07-23 05:54:01,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=618, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:54:01,596 INFO L413 NwaCegarLoop]: 171 mSDtfsCounter, 1 mSDsluCounter, 1333 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 1198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1105 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:01,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1504 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 1105 Unchecked, 0.1s Time] [2022-07-23 05:54:01,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-07-23 05:54:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-07-23 05:54:01,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 143 states have (on average 1.5524475524475525) internal successors, (222), 206 states have internal predecessors, (222), 10 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (20), 11 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-23 05:54:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 252 transitions. [2022-07-23 05:54:01,603 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 252 transitions. Word has length 75 [2022-07-23 05:54:01,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:01,604 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 252 transitions. [2022-07-23 05:54:01,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.9375) internal successors, (47), 16 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) [2022-07-23 05:54:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 252 transitions. [2022-07-23 05:54:01,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-23 05:54:01,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:01,606 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] [2022-07-23 05:54:01,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:01,811 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 [2022-07-23 05:54:01,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:01,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1045374201, now seen corresponding path program 1 times [2022-07-23 05:54:01,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:01,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781198278] [2022-07-23 05:54:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:01,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:01,839 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:01,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006989644] [2022-07-23 05:54:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:01,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:01,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:01,841 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) [2022-07-23 05:54:01,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-23 05:54:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:54:02,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-23 05:54:02,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-23 05:54:02,077 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:54:02,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:02,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781198278] [2022-07-23 05:54:02,078 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:02,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006989644] [2022-07-23 05:54:02,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006989644] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:54:02,078 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:54:02,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-23 05:54:02,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86691183] [2022-07-23 05:54:02,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:54:02,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-23 05:54:02,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:02,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-23 05:54:02,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-23 05:54:02,080 INFO L87 Difference]: Start difference. First operand 222 states and 252 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 05:54:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:02,140 INFO L93 Difference]: Finished difference Result 200 states and 216 transitions. [2022-07-23 05:54:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-23 05:54:02,141 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-07-23 05:54:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:02,142 INFO L225 Difference]: With dead ends: 200 [2022-07-23 05:54:02,142 INFO L226 Difference]: Without dead ends: 185 [2022-07-23 05:54:02,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-23 05:54:02,143 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 12 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:02,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 874 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-23 05:54:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-23 05:54:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 175. [2022-07-23 05:54:02,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 104 states have (on average 1.7115384615384615) internal successors, (178), 167 states have internal predecessors, (178), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-23 05:54:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2022-07-23 05:54:02,158 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 76 [2022-07-23 05:54:02,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:02,158 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2022-07-23 05:54:02,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 2 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-23 05:54:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2022-07-23 05:54:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-23 05:54:02,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:02,159 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] [2022-07-23 05:54:02,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:02,371 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 [2022-07-23 05:54:02,372 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:02,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:02,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1898289451, now seen corresponding path program 1 times [2022-07-23 05:54:02,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:02,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517346402] [2022-07-23 05:54:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:02,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:02,390 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:02,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801103325] [2022-07-23 05:54:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:02,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:02,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:02,392 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) [2022-07-23 05:54:02,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-23 05:54:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:54:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-23 05:54:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:02,710 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 05:54:02,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-23 05:54:02,789 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 05:54:02,789 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 [2022-07-23 05:54:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-23 05:54:02,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:03,107 INFO L356 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-07-23 05:54:03,107 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 [2022-07-23 05:54:03,118 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-23 05:54:03,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517346402] [2022-07-23 05:54:03,119 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:03,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801103325] [2022-07-23 05:54:03,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801103325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:54:03,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:54:03,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2022-07-23 05:54:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799886547] [2022-07-23 05:54:03,120 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:03,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 05:54:03,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:03,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 05:54:03,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-07-23 05:54:03,122 INFO L87 Difference]: Start difference. First operand 175 states and 190 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-23 05:54:11,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:11,625 INFO L93 Difference]: Finished difference Result 227 states and 248 transitions. [2022-07-23 05:54:11,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-23 05:54:11,626 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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 81 [2022-07-23 05:54:11,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:11,628 INFO L225 Difference]: With dead ends: 227 [2022-07-23 05:54:11,628 INFO L226 Difference]: Without dead ends: 227 [2022-07-23 05:54:11,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2022-07-23 05:54:11,629 INFO L413 NwaCegarLoop]: 152 mSDtfsCounter, 202 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 1120 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:11,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 1120 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 664 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2022-07-23 05:54:11,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-07-23 05:54:11,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 192. [2022-07-23 05:54:11,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 118 states have (on average 1.6440677966101696) internal successors, (194), 181 states have internal predecessors, (194), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-23 05:54:11,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 210 transitions. [2022-07-23 05:54:11,635 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 210 transitions. Word has length 81 [2022-07-23 05:54:11,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:11,635 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 210 transitions. [2022-07-23 05:54:11,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-23 05:54:11,636 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 210 transitions. [2022-07-23 05:54:11,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-23 05:54:11,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:11,637 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] [2022-07-23 05:54:11,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:11,843 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 [2022-07-23 05:54:11,844 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:11,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:11,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1898289452, now seen corresponding path program 2 times [2022-07-23 05:54:11,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:11,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415418172] [2022-07-23 05:54:11,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:11,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:11,869 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:11,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627735974] [2022-07-23 05:54:11,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:54:11,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:11,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:11,871 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) [2022-07-23 05:54:11,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-23 05:54:12,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:54:12,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:54:12,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-23 05:54:12,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:12,256 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 [2022-07-23 05:54:12,498 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:54:12,498 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 [2022-07-23 05:54:12,503 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 [2022-07-23 05:54:12,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:54:12,647 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 [2022-07-23 05:54:12,654 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:54:12,655 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 [2022-07-23 05:54:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 118 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-23 05:54:12,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:14,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415418172] [2022-07-23 05:54:14,819 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:14,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627735974] [2022-07-23 05:54:14,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627735974] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:54:14,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:54:14,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-07-23 05:54:14,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256295628] [2022-07-23 05:54:14,820 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:14,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-23 05:54:14,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:14,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-23 05:54:14,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:54:14,821 INFO L87 Difference]: Start difference. First operand 192 states and 210 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-23 05:54:15,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:15,364 INFO L93 Difference]: Finished difference Result 368 states and 398 transitions. [2022-07-23 05:54:15,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:54:15,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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 81 [2022-07-23 05:54:15,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:15,367 INFO L225 Difference]: With dead ends: 368 [2022-07-23 05:54:15,367 INFO L226 Difference]: Without dead ends: 368 [2022-07-23 05:54:15,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-07-23 05:54:15,368 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 279 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1244 SdHoareTripleChecker+Invalid, 1320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 368 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:15,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1244 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 941 Invalid, 0 Unknown, 368 Unchecked, 0.4s Time] [2022-07-23 05:54:15,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-23 05:54:15,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 195. [2022-07-23 05:54:15,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 121 states have (on average 1.628099173553719) internal successors, (197), 184 states have internal predecessors, (197), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-23 05:54:15,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 213 transitions. [2022-07-23 05:54:15,374 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 213 transitions. Word has length 81 [2022-07-23 05:54:15,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:15,375 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 213 transitions. [2022-07-23 05:54:15,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-23 05:54:15,375 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 213 transitions. [2022-07-23 05:54:15,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-23 05:54:15,376 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:15,376 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] [2022-07-23 05:54:15,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:15,603 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 [2022-07-23 05:54:15,603 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1282569151, now seen corresponding path program 1 times [2022-07-23 05:54:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:15,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842696077] [2022-07-23 05:54:15,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:15,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:15,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:15,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878070487] [2022-07-23 05:54:15,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:15,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:15,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:15,623 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) [2022-07-23 05:54:15,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-23 05:54:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:54:15,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-23 05:54:15,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-23 05:54:15,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:15,870 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 [2022-07-23 05:54:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-23 05:54:15,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842696077] [2022-07-23 05:54:15,935 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:15,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878070487] [2022-07-23 05:54:15,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878070487] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:54:15,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:54:15,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-23 05:54:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785447682] [2022-07-23 05:54:15,936 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:15,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:54:15,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:15,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:54:15,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:54:15,937 INFO L87 Difference]: Start difference. First operand 195 states and 213 transitions. Second operand has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-07-23 05:54:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:16,161 INFO L93 Difference]: Finished difference Result 213 states and 237 transitions. [2022-07-23 05:54:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-23 05:54:16,162 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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 82 [2022-07-23 05:54:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:16,163 INFO L225 Difference]: With dead ends: 213 [2022-07-23 05:54:16,163 INFO L226 Difference]: Without dead ends: 213 [2022-07-23 05:54:16,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-23 05:54:16,164 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 331 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:16,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 960 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:54:16,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-23 05:54:16,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 194. [2022-07-23 05:54:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 121 states have (on average 1.6115702479338843) internal successors, (195), 183 states have internal predecessors, (195), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-23 05:54:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 211 transitions. [2022-07-23 05:54:16,170 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 211 transitions. Word has length 82 [2022-07-23 05:54:16,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:16,170 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 211 transitions. [2022-07-23 05:54:16,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.222222222222222) internal successors, (38), 9 states have internal predecessors, (38), 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) [2022-07-23 05:54:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 211 transitions. [2022-07-23 05:54:16,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 05:54:16,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:16,172 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] [2022-07-23 05:54:16,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:16,383 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 [2022-07-23 05:54:16,383 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:16,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1350797929, now seen corresponding path program 1 times [2022-07-23 05:54:16,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:16,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202730904] [2022-07-23 05:54:16,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:16,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:16,399 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:16,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1960657088] [2022-07-23 05:54:16,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:16,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:16,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:16,401 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) [2022-07-23 05:54:16,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-23 05:54:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:54:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-23 05:54:16,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:16,691 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:54:16,692 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 [2022-07-23 05:54:16,755 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:54:16,755 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 [2022-07-23 05:54:16,858 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-23 05:54:16,859 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 [2022-07-23 05:54:16,881 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 97 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-23 05:54:16,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202730904] [2022-07-23 05:54:17,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:17,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960657088] [2022-07-23 05:54:17,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960657088] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:54:17,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:54:17,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-07-23 05:54:17,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71333724] [2022-07-23 05:54:17,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:17,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-23 05:54:17,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:17,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-23 05:54:17,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:54:17,075 INFO L87 Difference]: Start difference. First operand 194 states and 211 transitions. Second operand has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 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) [2022-07-23 05:54:17,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:17,510 INFO L93 Difference]: Finished difference Result 276 states and 302 transitions. [2022-07-23 05:54:17,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:54:17,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 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 88 [2022-07-23 05:54:17,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:17,512 INFO L225 Difference]: With dead ends: 276 [2022-07-23 05:54:17,512 INFO L226 Difference]: Without dead ends: 276 [2022-07-23 05:54:17,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 92 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:54:17,513 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 158 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:17,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 1422 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 647 Invalid, 0 Unknown, 271 Unchecked, 0.3s Time] [2022-07-23 05:54:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-23 05:54:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 240. [2022-07-23 05:54:17,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 161 states have (on average 1.4968944099378882) internal successors, (241), 222 states have internal predecessors, (241), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-23 05:54:17,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2022-07-23 05:54:17,520 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 88 [2022-07-23 05:54:17,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:17,521 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2022-07-23 05:54:17,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 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) [2022-07-23 05:54:17,521 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2022-07-23 05:54:17,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-23 05:54:17,522 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:17,522 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] [2022-07-23 05:54:17,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-23 05:54:17,747 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 [2022-07-23 05:54:17,747 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:17,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:17,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1350797930, now seen corresponding path program 1 times [2022-07-23 05:54:17,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:17,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694796803] [2022-07-23 05:54:17,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:17,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:17,774 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:17,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404065719] [2022-07-23 05:54:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:17,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:17,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:17,784 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) [2022-07-23 05:54:17,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-23 05:54:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:54:18,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-23 05:54:18,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:18,113 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 [2022-07-23 05:54:18,124 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 [2022-07-23 05:54:21,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:54:21,083 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 50 treesize of output 46 [2022-07-23 05:54:21,093 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:54:21,094 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 [2022-07-23 05:54:21,229 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 51 treesize of output 41 [2022-07-23 05:54:21,249 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 90 proven. 22 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-23 05:54:21,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:21,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:21,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694796803] [2022-07-23 05:54:21,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:21,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404065719] [2022-07-23 05:54:21,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404065719] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:54:21,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:54:21,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-23 05:54:21,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352445014] [2022-07-23 05:54:21,633 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:21,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-23 05:54:21,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:21,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-23 05:54:21,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:54:21,634 INFO L87 Difference]: Start difference. First operand 240 states and 267 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-23 05:54:23,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:23,757 INFO L93 Difference]: Finished difference Result 276 states and 320 transitions. [2022-07-23 05:54:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:54:23,758 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 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 88 [2022-07-23 05:54:23,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:23,759 INFO L225 Difference]: With dead ends: 276 [2022-07-23 05:54:23,759 INFO L226 Difference]: Without dead ends: 264 [2022-07-23 05:54:23,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:54:23,760 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 450 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:23,761 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1268 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 386 Invalid, 0 Unknown, 450 Unchecked, 0.4s Time] [2022-07-23 05:54:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-23 05:54:23,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-07-23 05:54:23,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 181 states have (on average 1.4640883977900552) internal successors, (265), 246 states have internal predecessors, (265), 13 states have call successors, (13), 4 states have call predecessors, (13), 8 states have return successors, (22), 13 states have call predecessors, (22), 13 states have call successors, (22) [2022-07-23 05:54:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 300 transitions. [2022-07-23 05:54:23,771 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 300 transitions. Word has length 88 [2022-07-23 05:54:23,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:23,771 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 300 transitions. [2022-07-23 05:54:23,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 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) [2022-07-23 05:54:23,772 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 300 transitions. [2022-07-23 05:54:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-23 05:54:23,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:23,773 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] [2022-07-23 05:54:23,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:23,993 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 [2022-07-23 05:54:23,993 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:23,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:23,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1452318619, now seen corresponding path program 2 times [2022-07-23 05:54:23,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:23,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505766226] [2022-07-23 05:54:23,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:23,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:24,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:24,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814527913] [2022-07-23 05:54:24,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:54:24,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:24,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:24,010 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) [2022-07-23 05:54:24,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-23 05:54:24,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:54:24,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:54:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 93 conjunts are in the unsatisfiable core [2022-07-23 05:54:24,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:24,254 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 [2022-07-23 05:54:24,261 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 [2022-07-23 05:54:24,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:54:24,849 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 [2022-07-23 05:54:24,872 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:54:24,872 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 [2022-07-23 05:54:25,196 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-23 05:54:25,197 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 [2022-07-23 05:54:25,208 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 [2022-07-23 05:54:25,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:54:25,426 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 [2022-07-23 05:54:25,454 INFO L356 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2022-07-23 05:54:25,455 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 [2022-07-23 05:54:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 103 proven. 39 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-23 05:54:25,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:29,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:29,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505766226] [2022-07-23 05:54:29,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:29,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814527913] [2022-07-23 05:54:29,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814527913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:54:29,791 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:54:29,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-07-23 05:54:29,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872633808] [2022-07-23 05:54:29,791 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:29,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-23 05:54:29,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:29,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-23 05:54:29,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-07-23 05:54:29,792 INFO L87 Difference]: Start difference. First operand 264 states and 300 transitions. Second operand has 17 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 05:54:30,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:30,576 INFO L93 Difference]: Finished difference Result 318 states and 356 transitions. [2022-07-23 05:54:30,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 05:54:30,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 89 [2022-07-23 05:54:30,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:30,579 INFO L225 Difference]: With dead ends: 318 [2022-07-23 05:54:30,579 INFO L226 Difference]: Without dead ends: 303 [2022-07-23 05:54:30,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:54:30,580 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 5 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1311 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 631 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:30,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1311 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 483 Invalid, 0 Unknown, 631 Unchecked, 0.5s Time] [2022-07-23 05:54:30,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-07-23 05:54:30,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 283. [2022-07-23 05:54:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 200 states have (on average 1.425) internal successors, (285), 262 states have internal predecessors, (285), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-23 05:54:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2022-07-23 05:54:30,587 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 89 [2022-07-23 05:54:30,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:30,588 INFO L495 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2022-07-23 05:54:30,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-23 05:54:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2022-07-23 05:54:30,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-23 05:54:30,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:30,589 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] [2022-07-23 05:54:30,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:30,803 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 [2022-07-23 05:54:30,803 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:30,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:30,804 INFO L85 PathProgramCache]: Analyzing trace with hash -2072204227, now seen corresponding path program 1 times [2022-07-23 05:54:30,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:30,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816887235] [2022-07-23 05:54:30,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:30,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:30,828 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:30,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [342705965] [2022-07-23 05:54:30,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:30,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:30,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:30,831 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) [2022-07-23 05:54:30,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-23 05:54:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:54:31,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-23 05:54:31,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:31,047 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-23 05:54:31,048 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:54:31,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:31,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816887235] [2022-07-23 05:54:31,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:31,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342705965] [2022-07-23 05:54:31,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342705965] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:54:31,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:54:31,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:54:31,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047940428] [2022-07-23 05:54:31,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:54:31,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:54:31,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:31,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:54:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:54:31,050 INFO L87 Difference]: Start difference. First operand 283 states and 312 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-07-23 05:54:31,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:31,155 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-07-23 05:54:31,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:54:31,155 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 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 90 [2022-07-23 05:54:31,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:31,157 INFO L225 Difference]: With dead ends: 322 [2022-07-23 05:54:31,157 INFO L226 Difference]: Without dead ends: 322 [2022-07-23 05:54:31,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:54:31,158 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 271 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:31,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 273 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:54:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-07-23 05:54:31,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 282. [2022-07-23 05:54:31,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 200 states have (on average 1.42) internal successors, (284), 261 states have internal predecessors, (284), 13 states have call successors, (13), 7 states have call predecessors, (13), 8 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-07-23 05:54:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 311 transitions. [2022-07-23 05:54:31,165 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 311 transitions. Word has length 90 [2022-07-23 05:54:31,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:31,165 INFO L495 AbstractCegarLoop]: Abstraction has 282 states and 311 transitions. [2022-07-23 05:54:31,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 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) [2022-07-23 05:54:31,166 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 311 transitions. [2022-07-23 05:54:31,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-23 05:54:31,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:31,167 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] [2022-07-23 05:54:31,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:31,379 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 [2022-07-23 05:54:31,379 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:31,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2072204226, now seen corresponding path program 1 times [2022-07-23 05:54:31,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:31,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449416219] [2022-07-23 05:54:31,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:31,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:31,396 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:31,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087044032] [2022-07-23 05:54:31,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:31,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:31,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:31,398 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) [2022-07-23 05:54:31,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-23 05:54:31,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:54:31,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-23 05:54:31,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:31,638 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 [2022-07-23 05:54:31,648 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 [2022-07-23 05:54:32,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:54:32,660 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 [2022-07-23 05:54:32,682 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:54:32,683 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 [2022-07-23 05:54:32,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:54:32,985 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 [2022-07-23 05:54:33,000 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:54:33,000 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 [2022-07-23 05:54:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 108 proven. 51 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-23 05:54:34,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:34,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:34,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449416219] [2022-07-23 05:54:34,398 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:34,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087044032] [2022-07-23 05:54:34,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087044032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:54:34,398 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:54:34,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-23 05:54:34,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760283154] [2022-07-23 05:54:34,398 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:34,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:54:34,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:54:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2022-07-23 05:54:34,400 INFO L87 Difference]: Start difference. First operand 282 states and 311 transitions. Second operand has 21 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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) [2022-07-23 05:54:35,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:35,410 INFO L93 Difference]: Finished difference Result 376 states and 439 transitions. [2022-07-23 05:54:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:54:35,411 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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 90 [2022-07-23 05:54:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:35,413 INFO L225 Difference]: With dead ends: 376 [2022-07-23 05:54:35,413 INFO L226 Difference]: Without dead ends: 376 [2022-07-23 05:54:35,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2022-07-23 05:54:35,414 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 4 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 1783 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1218 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:35,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 1783 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 1218 Unchecked, 0.1s Time] [2022-07-23 05:54:35,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-07-23 05:54:35,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 337. [2022-07-23 05:54:35,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 247 states have (on average 1.3724696356275303) internal successors, (339), 310 states have internal predecessors, (339), 17 states have call successors, (17), 7 states have call predecessors, (17), 12 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2022-07-23 05:54:35,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 388 transitions. [2022-07-23 05:54:35,424 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 388 transitions. Word has length 90 [2022-07-23 05:54:35,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:35,425 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 388 transitions. [2022-07-23 05:54:35,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 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) [2022-07-23 05:54:35,425 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 388 transitions. [2022-07-23 05:54:35,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-23 05:54:35,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:35,426 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2022-07-23 05:54:35,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:35,639 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 [2022-07-23 05:54:35,639 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:35,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:35,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1015753557, now seen corresponding path program 2 times [2022-07-23 05:54:35,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:35,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244675327] [2022-07-23 05:54:35,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:35,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:35,659 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:35,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1421338640] [2022-07-23 05:54:35,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:54:35,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:35,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:35,661 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) [2022-07-23 05:54:35,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-23 05:54:35,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:54:35,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:54:35,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-23 05:54:35,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:35,999 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 [2022-07-23 05:54:36,010 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 [2022-07-23 05:54:43,630 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:54:43,631 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 23 treesize of output 29 [2022-07-23 05:54:44,330 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:54:44,331 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 [2022-07-23 05:54:47,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:54:47,701 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 23 treesize of output 25 [2022-07-23 05:54:47,787 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-23 05:54:47,787 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 [2022-07-23 05:54:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 119 proven. 49 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-23 05:54:51,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:52,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:52,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244675327] [2022-07-23 05:54:52,948 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:52,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421338640] [2022-07-23 05:54:52,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421338640] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:54:52,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:54:52,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-07-23 05:54:52,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168820752] [2022-07-23 05:54:52,949 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:52,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-23 05:54:52,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:52,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-23 05:54:52,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2022-07-23 05:54:52,950 INFO L87 Difference]: Start difference. First operand 337 states and 388 transitions. Second operand has 28 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 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) [2022-07-23 05:54:57,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:57,295 INFO L93 Difference]: Finished difference Result 544 states and 641 transitions. [2022-07-23 05:54:57,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-23 05:54:57,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 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 91 [2022-07-23 05:54:57,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:57,300 INFO L225 Difference]: With dead ends: 544 [2022-07-23 05:54:57,300 INFO L226 Difference]: Without dead ends: 544 [2022-07-23 05:54:57,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=146, Invalid=1414, Unknown=0, NotChecked=0, Total=1560 [2022-07-23 05:54:57,301 INFO L413 NwaCegarLoop]: 296 mSDtfsCounter, 143 mSDsluCounter, 2984 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2097 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:57,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 3280 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 86 Invalid, 0 Unknown, 2097 Unchecked, 0.1s Time] [2022-07-23 05:54:57,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-07-23 05:54:57,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 366. [2022-07-23 05:54:57,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 269 states have (on average 1.3568773234200744) internal successors, (365), 335 states have internal predecessors, (365), 21 states have call successors, (21), 7 states have call predecessors, (21), 15 states have return successors, (50), 23 states have call predecessors, (50), 21 states have call successors, (50) [2022-07-23 05:54:57,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 436 transitions. [2022-07-23 05:54:57,321 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 436 transitions. Word has length 91 [2022-07-23 05:54:57,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:57,322 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 436 transitions. [2022-07-23 05:54:57,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 2.44) internal successors, (61), 25 states have internal predecessors, (61), 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) [2022-07-23 05:54:57,322 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 436 transitions. [2022-07-23 05:54:57,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-23 05:54:57,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:57,323 INFO L195 NwaCegarLoop]: trace histogram [8, 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] [2022-07-23 05:54:57,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-23 05:54:57,543 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 [2022-07-23 05:54:57,544 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:57,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:57,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1372254073, now seen corresponding path program 3 times [2022-07-23 05:54:57,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:57,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961039004] [2022-07-23 05:54:57,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:57,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:57,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:57,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [996778122] [2022-07-23 05:54:57,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-23 05:54:57,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:57,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:57,569 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) [2022-07-23 05:54:57,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-23 05:54:58,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-23 05:54:58,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:54:58,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-23 05:54:58,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 05:54:58,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:54:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-23 05:54:58,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:54:58,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961039004] [2022-07-23 05:54:58,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:54:58,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996778122] [2022-07-23 05:54:58,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996778122] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:54:58,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:54:58,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-07-23 05:54:58,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546515955] [2022-07-23 05:54:58,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:54:58,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-23 05:54:58,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:54:58,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-23 05:54:58,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-07-23 05:54:58,289 INFO L87 Difference]: Start difference. First operand 366 states and 436 transitions. Second operand has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 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) [2022-07-23 05:54:58,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:54:58,468 INFO L93 Difference]: Finished difference Result 385 states and 435 transitions. [2022-07-23 05:54:58,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:54:58,470 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 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 91 [2022-07-23 05:54:58,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:54:58,471 INFO L225 Difference]: With dead ends: 385 [2022-07-23 05:54:58,471 INFO L226 Difference]: Without dead ends: 355 [2022-07-23 05:54:58,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-07-23 05:54:58,472 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 65 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:54:58,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 857 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:54:58,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-07-23 05:54:58,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 321. [2022-07-23 05:54:58,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 237 states have (on average 1.3881856540084387) internal successors, (329), 297 states have internal predecessors, (329), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-23 05:54:58,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 355 transitions. [2022-07-23 05:54:58,482 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 355 transitions. Word has length 91 [2022-07-23 05:54:58,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:54:58,482 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 355 transitions. [2022-07-23 05:54:58,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.0) internal successors, (50), 10 states have internal predecessors, (50), 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) [2022-07-23 05:54:58,483 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 355 transitions. [2022-07-23 05:54:58,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-23 05:54:58,483 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:54:58,484 INFO L195 NwaCegarLoop]: trace histogram [14, 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] [2022-07-23 05:54:58,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-23 05:54:58,711 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 [2022-07-23 05:54:58,712 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:54:58,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:54:58,712 INFO L85 PathProgramCache]: Analyzing trace with hash -849515239, now seen corresponding path program 4 times [2022-07-23 05:54:58,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:54:58,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343391578] [2022-07-23 05:54:58,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:54:58,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:54:58,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:54:58,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [455265149] [2022-07-23 05:54:58,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-23 05:54:58,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:54:58,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:54:58,751 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) [2022-07-23 05:54:58,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-23 05:54:59,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-23 05:54:59,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:54:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-23 05:54:59,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:54:59,114 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 [2022-07-23 05:54:59,137 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 [2022-07-23 05:54:59,145 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 [2022-07-23 05:55:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:55:00,793 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 34 treesize of output 32 [2022-07-23 05:55:00,833 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:55:00,834 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 [2022-07-23 05:55:01,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:55:01,250 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 34 treesize of output 32 [2022-07-23 05:55:01,266 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:55:01,266 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 [2022-07-23 05:55:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 155 proven. 109 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-23 05:55:02,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:55:02,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:55:02,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343391578] [2022-07-23 05:55:02,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:55:02,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455265149] [2022-07-23 05:55:02,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455265149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:55:02,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:55:02,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-23 05:55:02,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804755358] [2022-07-23 05:55:02,769 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:55:02,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-23 05:55:02,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:55:02,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-23 05:55:02,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=631, Unknown=0, NotChecked=0, Total=702 [2022-07-23 05:55:02,771 INFO L87 Difference]: Start difference. First operand 321 states and 355 transitions. Second operand has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 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) [2022-07-23 05:55:04,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:55:04,132 INFO L93 Difference]: Finished difference Result 392 states and 443 transitions. [2022-07-23 05:55:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-23 05:55:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 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 97 [2022-07-23 05:55:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:55:04,134 INFO L225 Difference]: With dead ends: 392 [2022-07-23 05:55:04,135 INFO L226 Difference]: Without dead ends: 392 [2022-07-23 05:55:04,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2022-07-23 05:55:04,136 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 5 mSDsluCounter, 1729 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:55:04,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 1899 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 82 Invalid, 0 Unknown, 1153 Unchecked, 0.1s Time] [2022-07-23 05:55:04,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-07-23 05:55:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 364. [2022-07-23 05:55:04,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 274 states have (on average 1.3576642335766422) internal successors, (372), 334 states have internal predecessors, (372), 17 states have call successors, (17), 10 states have call predecessors, (17), 12 states have return successors, (22), 19 states have call predecessors, (22), 17 states have call successors, (22) [2022-07-23 05:55:04,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 411 transitions. [2022-07-23 05:55:04,145 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 411 transitions. Word has length 97 [2022-07-23 05:55:04,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:55:04,145 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 411 transitions. [2022-07-23 05:55:04,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 22 states have internal predecessors, (68), 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) [2022-07-23 05:55:04,146 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 411 transitions. [2022-07-23 05:55:04,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-23 05:55:04,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:55:04,147 INFO L195 NwaCegarLoop]: trace histogram [15, 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] [2022-07-23 05:55:04,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-23 05:55:04,376 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 [2022-07-23 05:55:04,376 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:55:04,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:55:04,376 INFO L85 PathProgramCache]: Analyzing trace with hash 745840980, now seen corresponding path program 5 times [2022-07-23 05:55:04,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:55:04,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454335347] [2022-07-23 05:55:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:55:04,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:55:04,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504020597] [2022-07-23 05:55:04,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-23 05:55:04,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:55:04,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:55:04,403 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) [2022-07-23 05:55:04,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-23 05:55:04,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:55:04,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:55:04,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-23 05:55:04,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:55:04,757 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 170 proven. 3 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-23 05:55:04,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:55:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 16 proven. 76 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2022-07-23 05:55:04,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:55:04,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454335347] [2022-07-23 05:55:04,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:55:04,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504020597] [2022-07-23 05:55:04,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504020597] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:55:04,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:55:04,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-07-23 05:55:04,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452537497] [2022-07-23 05:55:04,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:55:04,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-23 05:55:04,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:55:04,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-23 05:55:04,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-07-23 05:55:04,965 INFO L87 Difference]: Start difference. First operand 364 states and 411 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2022-07-23 05:55:05,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:55:05,194 INFO L93 Difference]: Finished difference Result 405 states and 451 transitions. [2022-07-23 05:55:05,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-23 05:55:05,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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 98 [2022-07-23 05:55:05,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:55:05,197 INFO L225 Difference]: With dead ends: 405 [2022-07-23 05:55:05,197 INFO L226 Difference]: Without dead ends: 345 [2022-07-23 05:55:05,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=239, Unknown=0, NotChecked=0, Total=380 [2022-07-23 05:55:05,198 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 51 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:55:05,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1038 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:55:05,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-23 05:55:05,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2022-07-23 05:55:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 261 states have (on average 1.3295019157088122) internal successors, (347), 321 states have internal predecessors, (347), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-23 05:55:05,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 373 transitions. [2022-07-23 05:55:05,205 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 373 transitions. Word has length 98 [2022-07-23 05:55:05,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:55:05,206 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 373 transitions. [2022-07-23 05:55:05,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 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) [2022-07-23 05:55:05,206 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 373 transitions. [2022-07-23 05:55:05,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-23 05:55:05,207 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:55:05,207 INFO L195 NwaCegarLoop]: trace histogram [34, 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] [2022-07-23 05:55:05,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-23 05:55:05,435 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 [2022-07-23 05:55:05,435 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:55:05,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:55:05,436 INFO L85 PathProgramCache]: Analyzing trace with hash 572964953, now seen corresponding path program 6 times [2022-07-23 05:55:05,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:55:05,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634394730] [2022-07-23 05:55:05,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:05,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:55:05,464 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:55:05,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951309771] [2022-07-23 05:55:05,465 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-23 05:55:05,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:55:05,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:55:05,466 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) [2022-07-23 05:55:05,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-23 05:55:11,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-23 05:55:11,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:55:11,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-23 05:55:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:55:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 392 proven. 52 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-07-23 05:55:11,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:55:12,191 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 210 proven. 10 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2022-07-23 05:55:12,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:55:12,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634394730] [2022-07-23 05:55:12,192 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:55:12,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951309771] [2022-07-23 05:55:12,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951309771] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:55:12,192 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:55:12,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2022-07-23 05:55:12,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22255538] [2022-07-23 05:55:12,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:55:12,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:55:12,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:55:12,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:55:12,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-07-23 05:55:12,193 INFO L87 Difference]: Start difference. First operand 345 states and 373 transitions. Second operand has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 1 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-23 05:55:13,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:55:13,098 INFO L93 Difference]: Finished difference Result 409 states and 453 transitions. [2022-07-23 05:55:13,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-23 05:55:13,100 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 1 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) Word has length 117 [2022-07-23 05:55:13,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:55:13,102 INFO L225 Difference]: With dead ends: 409 [2022-07-23 05:55:13,102 INFO L226 Difference]: Without dead ends: 369 [2022-07-23 05:55:13,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1762, Unknown=0, NotChecked=0, Total=2352 [2022-07-23 05:55:13,103 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 98 mSDsluCounter, 2028 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 2201 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:55:13,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 2201 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:55:13,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-23 05:55:13,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 369. [2022-07-23 05:55:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 285 states have (on average 1.3017543859649123) internal successors, (371), 345 states have internal predecessors, (371), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-23 05:55:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 397 transitions. [2022-07-23 05:55:13,110 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 397 transitions. Word has length 117 [2022-07-23 05:55:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:55:13,111 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 397 transitions. [2022-07-23 05:55:13,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.142857142857143) internal successors, (66), 20 states have internal predecessors, (66), 1 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 1 states have call successors, (8) [2022-07-23 05:55:13,111 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 397 transitions. [2022-07-23 05:55:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-23 05:55:13,112 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:55:13,112 INFO L195 NwaCegarLoop]: trace histogram [40, 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] [2022-07-23 05:55:13,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-23 05:55:13,329 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 [2022-07-23 05:55:13,329 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:55:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:55:13,329 INFO L85 PathProgramCache]: Analyzing trace with hash 752331705, now seen corresponding path program 7 times [2022-07-23 05:55:13,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:55:13,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115353607] [2022-07-23 05:55:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:13,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:55:13,363 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:55:13,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330015038] [2022-07-23 05:55:13,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-23 05:55:13,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:55:13,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:55:13,366 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) [2022-07-23 05:55:13,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-23 05:55:15,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:55:15,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-23 05:55:15,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:55:15,498 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 [2022-07-23 05:55:15,817 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:55:15,817 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 [2022-07-23 05:55:15,822 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 [2022-07-23 05:55:15,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:55:15,966 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 [2022-07-23 05:55:15,978 INFO L356 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2022-07-23 05:55:15,978 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 [2022-07-23 05:55:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 596 proven. 224 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2022-07-23 05:55:16,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:55:18,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:55:18,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115353607] [2022-07-23 05:55:18,183 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:55:18,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330015038] [2022-07-23 05:55:18,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330015038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:55:18,183 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:55:18,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-07-23 05:55:18,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342905223] [2022-07-23 05:55:18,184 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:55:18,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-23 05:55:18,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:55:18,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-23 05:55:18,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-07-23 05:55:18,185 INFO L87 Difference]: Start difference. First operand 369 states and 397 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) [2022-07-23 05:55:18,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:55:18,799 INFO L93 Difference]: Finished difference Result 540 states and 582 transitions. [2022-07-23 05:55:18,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-23 05:55:18,800 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 123 [2022-07-23 05:55:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:55:18,802 INFO L225 Difference]: With dead ends: 540 [2022-07-23 05:55:18,802 INFO L226 Difference]: Without dead ends: 540 [2022-07-23 05:55:18,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-07-23 05:55:18,803 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 168 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-23 05:55:18,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1124 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 928 Invalid, 0 Unknown, 219 Unchecked, 0.5s Time] [2022-07-23 05:55:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-07-23 05:55:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 374. [2022-07-23 05:55:18,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 290 states have (on average 1.306896551724138) internal successors, (379), 350 states have internal predecessors, (379), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-23 05:55:18,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 405 transitions. [2022-07-23 05:55:18,813 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 405 transitions. Word has length 123 [2022-07-23 05:55:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:55:18,813 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 405 transitions. [2022-07-23 05:55:18,813 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) [2022-07-23 05:55:18,814 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 405 transitions. [2022-07-23 05:55:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-23 05:55:18,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:55:18,815 INFO L195 NwaCegarLoop]: trace histogram [40, 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] [2022-07-23 05:55:18,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-23 05:55:19,032 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 [2022-07-23 05:55:19,033 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:55:19,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:55:19,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1436262970, now seen corresponding path program 1 times [2022-07-23 05:55:19,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:55:19,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106261353] [2022-07-23 05:55:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:19,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:55:19,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:55:19,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1058425937] [2022-07-23 05:55:19,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:19,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:55:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:55:19,072 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) [2022-07-23 05:55:19,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-23 05:55:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:55:19,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1221 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:55:19,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:55:19,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2022-07-23 05:55:19,459 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:55:19,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:55:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106261353] [2022-07-23 05:55:19,460 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:55:19,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058425937] [2022-07-23 05:55:19,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058425937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:55:19,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:55:19,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:55:19,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460509606] [2022-07-23 05:55:19,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:55:19,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:55:19,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:55:19,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:55:19,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:55:19,462 INFO L87 Difference]: Start difference. First operand 374 states and 405 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) [2022-07-23 05:55:19,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:55:19,549 INFO L93 Difference]: Finished difference Result 379 states and 413 transitions. [2022-07-23 05:55:19,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:55:19,550 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 125 [2022-07-23 05:55:19,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:55:19,551 INFO L225 Difference]: With dead ends: 379 [2022-07-23 05:55:19,551 INFO L226 Difference]: Without dead ends: 379 [2022-07-23 05:55:19,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:55:19,552 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 137 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:55:19,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:55:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-07-23 05:55:19,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 373. [2022-07-23 05:55:19,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 290 states have (on average 1.303448275862069) internal successors, (378), 349 states have internal predecessors, (378), 13 states have call successors, (13), 10 states have call predecessors, (13), 10 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-23 05:55:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 404 transitions. [2022-07-23 05:55:19,559 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 404 transitions. Word has length 125 [2022-07-23 05:55:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:55:19,560 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 404 transitions. [2022-07-23 05:55:19,560 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) [2022-07-23 05:55:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 404 transitions. [2022-07-23 05:55:19,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-23 05:55:19,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:55:19,561 INFO L195 NwaCegarLoop]: trace histogram [40, 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] [2022-07-23 05:55:19,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-23 05:55:19,775 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 [2022-07-23 05:55:19,775 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:55:19,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:55:19,776 INFO L85 PathProgramCache]: Analyzing trace with hash -30332895, now seen corresponding path program 1 times [2022-07-23 05:55:19,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:55:19,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388266362] [2022-07-23 05:55:19,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:19,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:55:19,807 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:55:19,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [231934021] [2022-07-23 05:55:19,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:19,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:55:19,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:55:19,810 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) [2022-07-23 05:55:19,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-23 05:55:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:55:20,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-23 05:55:20,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:55:20,324 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:55:20,325 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 [2022-07-23 05:55:20,391 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:55:20,392 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 [2022-07-23 05:55:20,497 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:55:20,498 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 [2022-07-23 05:55:20,640 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:55:20,640 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 [2022-07-23 05:55:20,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 316 proven. 616 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2022-07-23 05:55:20,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:55:21,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:55:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388266362] [2022-07-23 05:55:21,327 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:55:21,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231934021] [2022-07-23 05:55:21,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231934021] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:55:21,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:55:21,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-07-23 05:55:21,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248463873] [2022-07-23 05:55:21,328 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:55:21,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-23 05:55:21,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:55:21,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-23 05:55:21,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=767, Unknown=0, NotChecked=0, Total=870 [2022-07-23 05:55:21,329 INFO L87 Difference]: Start difference. First operand 373 states and 404 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) [2022-07-23 05:55:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:55:25,915 INFO L93 Difference]: Finished difference Result 648 states and 703 transitions. [2022-07-23 05:55:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-23 05:55:25,916 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 129 [2022-07-23 05:55:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:55:25,918 INFO L225 Difference]: With dead ends: 648 [2022-07-23 05:55:25,918 INFO L226 Difference]: Without dead ends: 648 [2022-07-23 05:55:25,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 154 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2022-07-23 05:55:25,919 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 286 mSDsluCounter, 1648 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 1791 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 646 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-23 05:55:25,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 1791 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 715 Invalid, 0 Unknown, 646 Unchecked, 0.3s Time] [2022-07-23 05:55:25,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-07-23 05:55:25,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 611. [2022-07-23 05:55:25,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 611 states, 508 states have (on average 1.2263779527559056) internal successors, (623), 566 states have internal predecessors, (623), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-23 05:55:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 671 transitions. [2022-07-23 05:55:25,931 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 671 transitions. Word has length 129 [2022-07-23 05:55:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:55:25,931 INFO L495 AbstractCegarLoop]: Abstraction has 611 states and 671 transitions. [2022-07-23 05:55:25,931 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) [2022-07-23 05:55:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 671 transitions. [2022-07-23 05:55:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-07-23 05:55:25,932 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:55:25,932 INFO L195 NwaCegarLoop]: trace histogram [40, 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] [2022-07-23 05:55:25,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-23 05:55:26,159 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 [2022-07-23 05:55:26,160 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:55:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:55:26,160 INFO L85 PathProgramCache]: Analyzing trace with hash -30332894, now seen corresponding path program 1 times [2022-07-23 05:55:26,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:55:26,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859180436] [2022-07-23 05:55:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:26,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:55:26,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:55:26,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517306389] [2022-07-23 05:55:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:26,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:55:26,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:55:26,200 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) [2022-07-23 05:55:26,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-23 05:55:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:55:31,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-23 05:55:31,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:55:31,939 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 [2022-07-23 05:55:31,955 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 [2022-07-23 05:55:44,019 WARN L233 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-23 05:55:44,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:55:44,346 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 [2022-07-23 05:55:44,352 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-23 05:55:44,353 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 [2022-07-23 05:55:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1155 backedges. 514 proven. 234 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2022-07-23 05:55:44,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:55:44,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:55:44,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859180436] [2022-07-23 05:55:44,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:55:44,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517306389] [2022-07-23 05:55:44,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517306389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:55:44,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:55:44,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-07-23 05:55:44,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385636811] [2022-07-23 05:55:44,623 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:55:44,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-23 05:55:44,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:55:44,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-23 05:55:44,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=538, Unknown=1, NotChecked=0, Total=600 [2022-07-23 05:55:44,624 INFO L87 Difference]: Start difference. First operand 611 states and 671 transitions. Second operand has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 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) [2022-07-23 05:55:55,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:55:55,962 INFO L93 Difference]: Finished difference Result 707 states and 783 transitions. [2022-07-23 05:55:55,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-23 05:55:55,963 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 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 129 [2022-07-23 05:55:55,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:55:55,965 INFO L225 Difference]: With dead ends: 707 [2022-07-23 05:55:55,965 INFO L226 Difference]: Without dead ends: 643 [2022-07-23 05:55:55,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=130, Invalid=1274, Unknown=2, NotChecked=0, Total=1406 [2022-07-23 05:55:55,966 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 0 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 1108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 783 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:55:55,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1847 Invalid, 1108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 318 Invalid, 0 Unknown, 783 Unchecked, 0.2s Time] [2022-07-23 05:55:55,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-07-23 05:55:55,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 619. [2022-07-23 05:55:55,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 619 states, 516 states have (on average 1.2228682170542635) internal successors, (631), 574 states have internal predecessors, (631), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-23 05:55:55,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 679 transitions. [2022-07-23 05:55:55,984 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 679 transitions. Word has length 129 [2022-07-23 05:55:55,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:55:55,984 INFO L495 AbstractCegarLoop]: Abstraction has 619 states and 679 transitions. [2022-07-23 05:55:55,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 20 states have internal predecessors, (65), 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) [2022-07-23 05:55:55,985 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 679 transitions. [2022-07-23 05:55:55,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-07-23 05:55:55,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:55:55,985 INFO L195 NwaCegarLoop]: trace histogram [41, 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] [2022-07-23 05:55:56,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-23 05:55:56,199 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 [2022-07-23 05:55:56,199 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:55:56,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:55:56,200 INFO L85 PathProgramCache]: Analyzing trace with hash -442397489, now seen corresponding path program 2 times [2022-07-23 05:55:56,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:55:56,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605753634] [2022-07-23 05:55:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:55:56,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:55:56,231 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:55:56,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150877122] [2022-07-23 05:55:56,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-23 05:55:56,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:55:56,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:55:56,233 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) [2022-07-23 05:55:56,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-23 05:55:57,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-23 05:55:57,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-23 05:55:57,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 1257 conjuncts, 158 conjunts are in the unsatisfiable core [2022-07-23 05:55:57,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:55:57,613 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 [2022-07-23 05:55:57,631 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 [2022-07-23 05:55:58,494 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:55:58,495 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 [2022-07-23 05:55:58,500 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 [2022-07-23 05:55:59,219 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:55:59,220 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 [2022-07-23 05:55:59,270 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-23 05:55:59,271 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 [2022-07-23 05:55:59,843 INFO L356 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-07-23 05:55:59,844 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 [2022-07-23 05:55:59,917 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-23 05:55:59,917 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 [2022-07-23 05:56:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-23 05:56:00,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2022-07-23 05:56:00,599 INFO L356 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2022-07-23 05:56:00,600 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 [2022-07-23 05:56:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 379 proven. 591 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2022-07-23 05:56:00,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:56:03,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:56:03,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605753634] [2022-07-23 05:56:03,794 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:56:03,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150877122] [2022-07-23 05:56:03,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150877122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:56:03,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:56:03,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-07-23 05:56:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463601647] [2022-07-23 05:56:03,795 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:56:03,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-23 05:56:03,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:56:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-23 05:56:03,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-07-23 05:56:03,796 INFO L87 Difference]: Start difference. First operand 619 states and 679 transitions. Second operand has 34 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 05:56:04,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:56:04,991 INFO L93 Difference]: Finished difference Result 628 states and 689 transitions. [2022-07-23 05:56:04,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-23 05:56:04,993 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 130 [2022-07-23 05:56:04,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:56:04,994 INFO L225 Difference]: With dead ends: 628 [2022-07-23 05:56:04,994 INFO L226 Difference]: Without dead ends: 628 [2022-07-23 05:56:04,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 112 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-07-23 05:56:04,995 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 2 mSDsluCounter, 1525 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1681 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 997 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-23 05:56:04,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 1681 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 437 Invalid, 0 Unknown, 997 Unchecked, 0.6s Time] [2022-07-23 05:56:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-07-23 05:56:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 626. [2022-07-23 05:56:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 523 states have (on average 1.2217973231357553) internal successors, (639), 581 states have internal predecessors, (639), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-23 05:56:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 687 transitions. [2022-07-23 05:56:05,005 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 687 transitions. Word has length 130 [2022-07-23 05:56:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:56:05,006 INFO L495 AbstractCegarLoop]: Abstraction has 626 states and 687 transitions. [2022-07-23 05:56:05,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 2.586206896551724) internal successors, (75), 29 states have internal predecessors, (75), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 05:56:05,006 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 687 transitions. [2022-07-23 05:56:05,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-23 05:56:05,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:56:05,007 INFO L195 NwaCegarLoop]: trace histogram [41, 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] [2022-07-23 05:56:05,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-23 05:56:05,231 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 [2022-07-23 05:56:05,231 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:56:05,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:56:05,232 INFO L85 PathProgramCache]: Analyzing trace with hash -829420247, now seen corresponding path program 1 times [2022-07-23 05:56:05,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:56:05,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413524839] [2022-07-23 05:56:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:05,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:56:05,273 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:56:05,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1086584078] [2022-07-23 05:56:05,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:05,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:56:05,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:56:05,283 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) [2022-07-23 05:56:05,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-23 05:56:05,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:56:05,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-23 05:56:05,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:56:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2022-07-23 05:56:05,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:56:05,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:56:05,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413524839] [2022-07-23 05:56:05,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:56:05,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086584078] [2022-07-23 05:56:05,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086584078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:56:05,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:56:05,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-23 05:56:05,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291870480] [2022-07-23 05:56:05,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:56:05,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-23 05:56:05,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:56:05,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-23 05:56:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-23 05:56:05,804 INFO L87 Difference]: Start difference. First operand 626 states and 687 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) [2022-07-23 05:56:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:56:05,906 INFO L93 Difference]: Finished difference Result 660 states and 724 transitions. [2022-07-23 05:56:05,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-23 05:56:05,906 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 131 [2022-07-23 05:56:05,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:56:05,908 INFO L225 Difference]: With dead ends: 660 [2022-07-23 05:56:05,908 INFO L226 Difference]: Without dead ends: 660 [2022-07-23 05:56:05,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-23 05:56:05,909 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 243 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:56:05,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 272 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:56:05,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 660 states. [2022-07-23 05:56:05,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 660 to 625. [2022-07-23 05:56:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 523 states have (on average 1.219885277246654) internal successors, (638), 580 states have internal predecessors, (638), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-23 05:56:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 686 transitions. [2022-07-23 05:56:05,919 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 686 transitions. Word has length 131 [2022-07-23 05:56:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:56:05,920 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 686 transitions. [2022-07-23 05:56:05,920 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) [2022-07-23 05:56:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 686 transitions. [2022-07-23 05:56:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-23 05:56:05,921 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:56:05,921 INFO L195 NwaCegarLoop]: trace histogram [41, 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] [2022-07-23 05:56:05,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-23 05:56:06,135 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 [2022-07-23 05:56:06,136 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:56:06,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:56:06,136 INFO L85 PathProgramCache]: Analyzing trace with hash -829420246, now seen corresponding path program 1 times [2022-07-23 05:56:06,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:56:06,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840787959] [2022-07-23 05:56:06,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:06,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:56:06,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:56:06,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222500286] [2022-07-23 05:56:06,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:06,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:56:06,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:56:06,179 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) [2022-07-23 05:56:06,181 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-23 05:56:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:56:06,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-23 05:56:06,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:56:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 112 proven. 203 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-07-23 05:56:06,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:56:06,906 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-23 05:56:06,906 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 [2022-07-23 05:56:07,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 112 proven. 203 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2022-07-23 05:56:07,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:56:07,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840787959] [2022-07-23 05:56:07,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:56:07,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222500286] [2022-07-23 05:56:07,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222500286] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-23 05:56:07,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-23 05:56:07,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2022-07-23 05:56:07,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119858319] [2022-07-23 05:56:07,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-23 05:56:07,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-23 05:56:07,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:56:07,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-23 05:56:07,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-07-23 05:56:07,132 INFO L87 Difference]: Start difference. First operand 625 states and 686 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) [2022-07-23 05:56:07,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:56:07,394 INFO L93 Difference]: Finished difference Result 633 states and 697 transitions. [2022-07-23 05:56:07,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-23 05:56:07,395 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 131 [2022-07-23 05:56:07,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:56:07,396 INFO L225 Difference]: With dead ends: 633 [2022-07-23 05:56:07,397 INFO L226 Difference]: Without dead ends: 633 [2022-07-23 05:56:07,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-07-23 05:56:07,397 INFO L413 NwaCegarLoop]: 146 mSDtfsCounter, 460 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:56:07,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 1048 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-23 05:56:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-07-23 05:56:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 624. [2022-07-23 05:56:07,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 523 states have (on average 1.2179732313575526) internal successors, (637), 579 states have internal predecessors, (637), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-23 05:56:07,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 685 transitions. [2022-07-23 05:56:07,407 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 685 transitions. Word has length 131 [2022-07-23 05:56:07,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:56:07,407 INFO L495 AbstractCegarLoop]: Abstraction has 624 states and 685 transitions. [2022-07-23 05:56:07,408 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) [2022-07-23 05:56:07,408 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 685 transitions. [2022-07-23 05:56:07,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-07-23 05:56:07,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:56:07,409 INFO L195 NwaCegarLoop]: trace histogram [41, 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] [2022-07-23 05:56:07,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-23 05:56:07,635 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 [2022-07-23 05:56:07,635 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:56:07,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:56:07,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1791061547, now seen corresponding path program 1 times [2022-07-23 05:56:07,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:56:07,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973219605] [2022-07-23 05:56:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:07,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:56:07,674 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:56:07,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081375049] [2022-07-23 05:56:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:07,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:56:07,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:56:07,677 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) [2022-07-23 05:56:07,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-23 05:56:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:56:08,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-23 05:56:08,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:56:08,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1201 trivial. 0 not checked. [2022-07-23 05:56:08,206 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-23 05:56:08,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:56:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973219605] [2022-07-23 05:56:08,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:56:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081375049] [2022-07-23 05:56:08,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081375049] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-23 05:56:08,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-23 05:56:08,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-23 05:56:08,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804510381] [2022-07-23 05:56:08,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-23 05:56:08,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-23 05:56:08,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:56:08,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-23 05:56:08,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-23 05:56:08,208 INFO L87 Difference]: Start difference. First operand 624 states and 685 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) [2022-07-23 05:56:08,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:56:08,326 INFO L93 Difference]: Finished difference Result 627 states and 690 transitions. [2022-07-23 05:56:08,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-23 05:56:08,327 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 133 [2022-07-23 05:56:08,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:56:08,329 INFO L225 Difference]: With dead ends: 627 [2022-07-23 05:56:08,329 INFO L226 Difference]: Without dead ends: 627 [2022-07-23 05:56:08,329 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 [2022-07-23 05:56:08,329 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 121 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-23 05:56:08,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 196 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-23 05:56:08,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 627 states. [2022-07-23 05:56:08,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 627 to 623. [2022-07-23 05:56:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 623 states, 523 states have (on average 1.2160611854684513) internal successors, (636), 578 states have internal predecessors, (636), 24 states have call successors, (24), 20 states have call predecessors, (24), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-07-23 05:56:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 623 states to 623 states and 684 transitions. [2022-07-23 05:56:08,339 INFO L78 Accepts]: Start accepts. Automaton has 623 states and 684 transitions. Word has length 133 [2022-07-23 05:56:08,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:56:08,339 INFO L495 AbstractCegarLoop]: Abstraction has 623 states and 684 transitions. [2022-07-23 05:56:08,339 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) [2022-07-23 05:56:08,340 INFO L276 IsEmpty]: Start isEmpty. Operand 623 states and 684 transitions. [2022-07-23 05:56:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-23 05:56:08,340 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:56:08,340 INFO L195 NwaCegarLoop]: trace histogram [41, 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] [2022-07-23 05:56:08,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-23 05:56:08,559 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 [2022-07-23 05:56:08,559 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:56:08,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:56:08,560 INFO L85 PathProgramCache]: Analyzing trace with hash 851962130, now seen corresponding path program 1 times [2022-07-23 05:56:08,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:56:08,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803444214] [2022-07-23 05:56:08,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:08,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:56:08,600 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:56:08,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895533885] [2022-07-23 05:56:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:08,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:56:08,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:56:08,602 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) [2022-07-23 05:56:08,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-23 05:56:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-23 05:56:09,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-23 05:56:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-23 05:56:09,449 INFO L356 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-07-23 05:56:09,449 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 [2022-07-23 05:56:09,616 INFO L356 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-07-23 05:56:09,616 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 [2022-07-23 05:56:09,903 INFO L356 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-07-23 05:56:09,903 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 [2022-07-23 05:56:10,118 INFO L356 Elim1Store]: treesize reduction 30, result has 48.3 percent of original size [2022-07-23 05:56:10,119 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 42 [2022-07-23 05:56:18,537 INFO L356 Elim1Store]: treesize reduction 40, result has 68.0 percent of original size [2022-07-23 05:56:18,537 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 133 [2022-07-23 05:56:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 117 proven. 851 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2022-07-23 05:56:21,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-23 05:56:21,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-23 05:56:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803444214] [2022-07-23 05:56:21,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-23 05:56:21,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895533885] [2022-07-23 05:56:21,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895533885] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-23 05:56:21,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-23 05:56:21,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-07-23 05:56:21,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65586596] [2022-07-23 05:56:21,859 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-23 05:56:21,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-23 05:56:21,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-23 05:56:21,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-23 05:56:21,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1185, Unknown=4, NotChecked=0, Total=1332 [2022-07-23 05:56:21,860 INFO L87 Difference]: Start difference. First operand 623 states and 684 transitions. Second operand has 35 states, 32 states have (on average 2.53125) internal successors, (81), 29 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 05:56:26,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-23 05:56:26,253 INFO L93 Difference]: Finished difference Result 927 states and 1018 transitions. [2022-07-23 05:56:26,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-23 05:56:26,254 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.53125) internal successors, (81), 29 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 137 [2022-07-23 05:56:26,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-23 05:56:26,257 INFO L225 Difference]: With dead ends: 927 [2022-07-23 05:56:26,257 INFO L226 Difference]: Without dead ends: 927 [2022-07-23 05:56:26,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=211, Invalid=1853, Unknown=6, NotChecked=0, Total=2070 [2022-07-23 05:56:26,258 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 114 mSDsluCounter, 1961 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 2105 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 767 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-23 05:56:26,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 2105 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 330 Invalid, 0 Unknown, 767 Unchecked, 0.2s Time] [2022-07-23 05:56:26,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-07-23 05:56:26,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 893. [2022-07-23 05:56:26,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 770 states have (on average 1.1883116883116882) internal successors, (915), 825 states have internal predecessors, (915), 37 states have call successors, (37), 30 states have call predecessors, (37), 30 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-07-23 05:56:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 989 transitions. [2022-07-23 05:56:26,271 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 989 transitions. Word has length 137 [2022-07-23 05:56:26,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-23 05:56:26,272 INFO L495 AbstractCegarLoop]: Abstraction has 893 states and 989 transitions. [2022-07-23 05:56:26,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.53125) internal successors, (81), 29 states have internal predecessors, (81), 5 states have call successors, (6), 2 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-23 05:56:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 989 transitions. [2022-07-23 05:56:26,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-07-23 05:56:26,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-23 05:56:26,273 INFO L195 NwaCegarLoop]: trace histogram [41, 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] [2022-07-23 05:56:26,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-23 05:56:26,487 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 [2022-07-23 05:56:26,487 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 67 more)] === [2022-07-23 05:56:26,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-23 05:56:26,488 INFO L85 PathProgramCache]: Analyzing trace with hash 851962131, now seen corresponding path program 1 times [2022-07-23 05:56:26,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-23 05:56:26,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981126915] [2022-07-23 05:56:26,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:26,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-23 05:56:26,520 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-23 05:56:26,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922941115] [2022-07-23 05:56:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-23 05:56:26,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-23 05:56:26,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-23 05:56:26,522 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) [2022-07-23 05:56:26,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process