./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 ff03de63 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-dev-ff03de6 [2021-12-21 18:04:40,673 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 18:04:40,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 18:04:40,711 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 18:04:40,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 18:04:40,714 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 18:04:40,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 18:04:40,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 18:04:40,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 18:04:40,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 18:04:40,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 18:04:40,725 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 18:04:40,725 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 18:04:40,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 18:04:40,728 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 18:04:40,729 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 18:04:40,730 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 18:04:40,731 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 18:04:40,734 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 18:04:40,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 18:04:40,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 18:04:40,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 18:04:40,742 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 18:04:40,743 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 18:04:40,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 18:04:40,748 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 18:04:40,748 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 18:04:40,748 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 18:04:40,749 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 18:04:40,750 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 18:04:40,750 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 18:04:40,750 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 18:04:40,751 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 18:04:40,752 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 18:04:40,753 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 18:04:40,754 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 18:04:40,754 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 18:04:40,754 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 18:04:40,754 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 18:04:40,755 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 18:04:40,755 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 18:04:40,757 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-21 18:04:40,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 18:04:40,785 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 18:04:40,785 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 18:04:40,785 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 18:04:40,786 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 18:04:40,786 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 18:04:40,786 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 18:04:40,787 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 18:04:40,787 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 18:04:40,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 18:04:40,788 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 18:04:40,788 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-21 18:04:40,788 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 18:04:40,788 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 18:04:40,788 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 18:04:40,788 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-21 18:04:40,788 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-21 18:04:40,789 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-21 18:04:40,789 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 18:04:40,789 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 18:04:40,789 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 18:04:40,789 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 18:04:40,789 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 18:04:40,789 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 18:04:40,790 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 18:04:40,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:04:40,790 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 18:04:40,790 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 18:04:40,790 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 18:04:40,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 18:04:40,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 18:04:40,791 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3248e88e6fd49fdcf0a9f78f1aa9e69276951d353f75f39f6bb30d51b2e53989 [2021-12-21 18:04:40,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 18:04:40,993 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 18:04:40,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 18:04:40,995 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 18:04:40,996 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 18:04:40,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/test-0234-2.i [2021-12-21 18:04:41,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8e1c872f/338245cfc0054273afdddd381be75e89/FLAG174651bf3 [2021-12-21 18:04:41,448 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 18:04:41,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/test-0234-2.i [2021-12-21 18:04:41,477 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8e1c872f/338245cfc0054273afdddd381be75e89/FLAG174651bf3 [2021-12-21 18:04:41,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e8e1c872f/338245cfc0054273afdddd381be75e89 [2021-12-21 18:04:41,488 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 18:04:41,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 18:04:41,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 18:04:41,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 18:04:41,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 18:04:41,493 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,494 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77612d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41, skipping insertion in model container [2021-12-21 18:04:41,494 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 18:04:41,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 18:04:41,776 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:04:41,788 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 18:04:41,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 18:04:41,840 INFO L208 MainTranslator]: Completed translation [2021-12-21 18:04:41,841 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41 WrapperNode [2021-12-21 18:04:41,841 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 18:04:41,841 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 18:04:41,842 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 18:04:41,842 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 18:04:41,846 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,878 INFO L137 Inliner]: procedures = 188, calls = 58, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 197 [2021-12-21 18:04:41,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 18:04:41,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 18:04:41,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 18:04:41,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 18:04:41,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,888 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,897 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 18:04:41,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 18:04:41,902 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 18:04:41,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 18:04:41,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (1/1) ... [2021-12-21 18:04:41,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 18:04:41,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:41,930 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) [2021-12-21 18:04:41,932 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 [2021-12-21 18:04:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 18:04:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 18:04:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 18:04:41,953 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 18:04:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure zalloc_or_die [2021-12-21 18:04:41,954 INFO L138 BoogieDeclarations]: Found implementation of procedure zalloc_or_die [2021-12-21 18:04:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 18:04:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-21 18:04:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 18:04:41,954 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 18:04:41,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 18:04:42,043 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 18:04:42,044 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 18:04:42,349 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 18:04:42,354 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 18:04:42,354 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-21 18:04:42,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:04:42 BoogieIcfgContainer [2021-12-21 18:04:42,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 18:04:42,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 18:04:42,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 18:04:42,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 18:04:42,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:04:41" (1/3) ... [2021-12-21 18:04:42,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac97890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:04:42, skipping insertion in model container [2021-12-21 18:04:42,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:04:41" (2/3) ... [2021-12-21 18:04:42,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ac97890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:04:42, skipping insertion in model container [2021-12-21 18:04:42,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:04:42" (3/3) ... [2021-12-21 18:04:42,361 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0234-2.i [2021-12-21 18:04:42,364 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 18:04:42,364 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2021-12-21 18:04:42,388 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 18:04:42,392 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 18:04:42,392 INFO L340 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2021-12-21 18:04:42,403 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) [2021-12-21 18:04:42,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-21 18:04:42,407 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:42,408 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-21 18:04:42,408 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:04:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:42,411 INFO L85 PathProgramCache]: Analyzing trace with hash 930118, now seen corresponding path program 1 times [2021-12-21 18:04:42,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:42,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547307488] [2021-12-21 18:04:42,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:42,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:42,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:42,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:42,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547307488] [2021-12-21 18:04:42,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547307488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:42,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:42,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:42,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355628282] [2021-12-21 18:04:42,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:42,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 18:04:42,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:42,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 18:04:42,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 18:04:42,526 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) [2021-12-21 18:04:42,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:42,554 INFO L93 Difference]: Finished difference Result 182 states and 197 transitions. [2021-12-21 18:04:42,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 18:04:42,557 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 [2021-12-21 18:04:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:42,565 INFO L225 Difference]: With dead ends: 182 [2021-12-21 18:04:42,565 INFO L226 Difference]: Without dead ends: 180 [2021-12-21 18:04:42,567 INFO L932 BasicCegarLoop]: 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 [2021-12-21 18:04:42,569 INFO L933 BasicCegarLoop]: 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 [2021-12-21 18:04:42,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:04:42,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-12-21 18:04:42,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2021-12-21 18:04:42,600 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) [2021-12-21 18:04:42,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 195 transitions. [2021-12-21 18:04:42,603 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 195 transitions. Word has length 4 [2021-12-21 18:04:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:42,604 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 195 transitions. [2021-12-21 18:04:42,605 INFO L471 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) [2021-12-21 18:04:42,605 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 195 transitions. [2021-12-21 18:04:42,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-21 18:04:42,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:42,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-21 18:04:42,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 18:04:42,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting zalloc_or_dieErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:04:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash 889833681, now seen corresponding path program 1 times [2021-12-21 18:04:42,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:42,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274755817] [2021-12-21 18:04:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:42,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:42,618 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:42,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736691606] [2021-12-21 18:04:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:42,619 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:42,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:42,624 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) [2021-12-21 18:04:42,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 18:04:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:42,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 18:04:42,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:42,762 INFO L387 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 [2021-12-21 18:04:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:42,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:42,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:42,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274755817] [2021-12-21 18:04:42,770 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:42,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736691606] [2021-12-21 18:04:42,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736691606] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:42,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:42,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:42,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303422679] [2021-12-21 18:04:42,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:42,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:04:42,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:42,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:04:42,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:42,777 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) [2021-12-21 18:04:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:42,904 INFO L93 Difference]: Finished difference Result 179 states and 194 transitions. [2021-12-21 18:04:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:04:42,904 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 [2021-12-21 18:04:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:42,909 INFO L225 Difference]: With dead ends: 179 [2021-12-21 18:04:42,909 INFO L226 Difference]: Without dead ends: 179 [2021-12-21 18:04:42,911 INFO L932 BasicCegarLoop]: 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 [2021-12-21 18:04:42,912 INFO L933 BasicCegarLoop]: 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 [2021-12-21 18:04:42,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 302 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:04:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-21 18:04:42,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2021-12-21 18:04:42,931 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) [2021-12-21 18:04:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 194 transitions. [2021-12-21 18:04:42,935 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 194 transitions. Word has length 6 [2021-12-21 18:04:42,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:42,936 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 194 transitions. [2021-12-21 18:04:42,936 INFO L471 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) [2021-12-21 18:04:42,936 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 194 transitions. [2021-12-21 18:04:42,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 18:04:42,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:42,937 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 18:04:42,958 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:43,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:43,152 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting zalloc_or_dieErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:04:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1815040656, now seen corresponding path program 1 times [2021-12-21 18:04:43,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:43,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579521580] [2021-12-21 18:04:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:43,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:43,161 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:43,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1563300776] [2021-12-21 18:04:43,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:43,161 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:43,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:43,162 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) [2021-12-21 18:04:43,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 18:04:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:43,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-21 18:04:43,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:43,294 INFO L387 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 [2021-12-21 18:04:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 18:04:43,354 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:04:43,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:43,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579521580] [2021-12-21 18:04:43,356 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:43,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563300776] [2021-12-21 18:04:43,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563300776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:04:43,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:04:43,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 18:04:43,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333430338] [2021-12-21 18:04:43,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:04:43,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 18:04:43,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 18:04:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 18:04:43,358 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) [2021-12-21 18:04:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:43,368 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2021-12-21 18:04:43,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 18:04:43,369 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 [2021-12-21 18:04:43,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:43,370 INFO L225 Difference]: With dead ends: 178 [2021-12-21 18:04:43,370 INFO L226 Difference]: Without dead ends: 178 [2021-12-21 18:04:43,370 INFO L932 BasicCegarLoop]: 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 [2021-12-21 18:04:43,372 INFO L933 BasicCegarLoop]: 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 [2021-12-21 18:04:43,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 325 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2021-12-21 18:04:43,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-12-21 18:04:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-12-21 18:04:43,382 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) [2021-12-21 18:04:43,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 193 transitions. [2021-12-21 18:04:43,386 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 193 transitions. Word has length 7 [2021-12-21 18:04:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:43,386 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 193 transitions. [2021-12-21 18:04:43,386 INFO L471 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) [2021-12-21 18:04:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 193 transitions. [2021-12-21 18:04:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 18:04:43,389 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:43,390 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:04:43,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:43,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-21 18:04:43,603 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:04:43,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:43,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051478, now seen corresponding path program 1 times [2021-12-21 18:04:43,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:43,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155896900] [2021-12-21 18:04:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:43,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:43,620 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:43,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [82226667] [2021-12-21 18:04:43,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:43,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:43,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:43,626 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) [2021-12-21 18:04:43,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 18:04:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:43,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 18:04:43,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:44,022 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:04:44,022 INFO L387 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 [2021-12-21 18:04:44,034 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 18:04:44,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:44,232 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:04:44,233 INFO L387 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 [2021-12-21 18:04:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 18:04:44,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:44,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155896900] [2021-12-21 18:04:44,296 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:44,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82226667] [2021-12-21 18:04:44,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82226667] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:04:44,296 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:04:44,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-21 18:04:44,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926750713] [2021-12-21 18:04:44,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:44,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:04:44,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:44,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:04:44,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:04:44,299 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) [2021-12-21 18:04:52,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:52,758 INFO L93 Difference]: Finished difference Result 223 states and 243 transitions. [2021-12-21 18:04:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 18:04:52,758 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 [2021-12-21 18:04:52,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:52,760 INFO L225 Difference]: With dead ends: 223 [2021-12-21 18:04:52,760 INFO L226 Difference]: Without dead ends: 223 [2021-12-21 18:04:52,761 INFO L932 BasicCegarLoop]: 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 [2021-12-21 18:04:52,761 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 125 mSDsluCounter, 1131 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-21 18:04:52,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 1284 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 590 Invalid, 0 Unknown, 300 Unchecked, 0.3s Time] [2021-12-21 18:04:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-12-21 18:04:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 187. [2021-12-21 18:04:52,770 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) [2021-12-21 18:04:52,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 204 transitions. [2021-12-21 18:04:52,772 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 204 transitions. Word has length 73 [2021-12-21 18:04:52,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:52,773 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 204 transitions. [2021-12-21 18:04:52,773 INFO L471 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) [2021-12-21 18:04:52,774 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 204 transitions. [2021-12-21 18:04:52,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-21 18:04:52,776 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:52,776 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:04:52,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:52,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:52,990 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:04:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1487051477, now seen corresponding path program 1 times [2021-12-21 18:04:52,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:52,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573376073] [2021-12-21 18:04:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:52,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:53,008 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:53,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781005428] [2021-12-21 18:04:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:53,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:53,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:53,023 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) [2021-12-21 18:04:53,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 18:04:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:53,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-21 18:04:53,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:53,248 INFO L387 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 [2021-12-21 18:04:53,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:04:53,675 INFO L387 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 [2021-12-21 18:04:53,683 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:04:53,683 INFO L387 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 [2021-12-21 18:04:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 69 proven. 8 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-12-21 18:04:53,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:53,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:53,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573376073] [2021-12-21 18:04:53,799 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:53,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781005428] [2021-12-21 18:04:53,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781005428] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:04:53,799 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:04:53,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-12-21 18:04:53,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652356204] [2021-12-21 18:04:53,799 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:53,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-21 18:04:53,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:53,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-21 18:04:53,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:04:53,800 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) [2021-12-21 18:04:54,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:54,283 INFO L93 Difference]: Finished difference Result 186 states and 202 transitions. [2021-12-21 18:04:54,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 18:04:54,284 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 [2021-12-21 18:04:54,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:54,285 INFO L225 Difference]: With dead ends: 186 [2021-12-21 18:04:54,285 INFO L226 Difference]: Without dead ends: 186 [2021-12-21 18:04:54,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:04:54,285 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 2 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:54,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1119 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 516 Invalid, 0 Unknown, 311 Unchecked, 0.3s Time] [2021-12-21 18:04:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-21 18:04:54,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-12-21 18:04:54,289 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) [2021-12-21 18:04:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 202 transitions. [2021-12-21 18:04:54,290 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 202 transitions. Word has length 73 [2021-12-21 18:04:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:54,290 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 202 transitions. [2021-12-21 18:04:54,290 INFO L471 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) [2021-12-21 18:04:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 202 transitions. [2021-12-21 18:04:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 18:04:54,291 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:54,291 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:04:54,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 18:04:54,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:54,499 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:04:54,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:54,500 INFO L85 PathProgramCache]: Analyzing trace with hash 120292531, now seen corresponding path program 1 times [2021-12-21 18:04:54,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:54,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808333979] [2021-12-21 18:04:54,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:54,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:54,533 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:54,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429800902] [2021-12-21 18:04:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:54,535 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:54,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:54,542 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) [2021-12-21 18:04:54,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 18:04:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:54,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 18:04:54,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:54,898 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:04:54,898 INFO L387 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 [2021-12-21 18:04:54,909 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 18:04:54,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:55,084 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:04:55,085 INFO L387 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 [2021-12-21 18:04:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 73 proven. 9 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 18:04:55,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:55,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808333979] [2021-12-21 18:04:55,140 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:55,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429800902] [2021-12-21 18:04:55,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429800902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:04:55,140 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:04:55,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 13 [2021-12-21 18:04:55,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666985706] [2021-12-21 18:04:55,141 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:55,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:04:55,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:04:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-12-21 18:04:55,143 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) [2021-12-21 18:04:55,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:04:55,422 INFO L93 Difference]: Finished difference Result 220 states and 240 transitions. [2021-12-21 18:04:55,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 18:04:55,424 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 [2021-12-21 18:04:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:04:55,425 INFO L225 Difference]: With dead ends: 220 [2021-12-21 18:04:55,425 INFO L226 Difference]: Without dead ends: 220 [2021-12-21 18:04:55,425 INFO L932 BasicCegarLoop]: 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 [2021-12-21 18:04:55,425 INFO L933 BasicCegarLoop]: 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:04:55,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 1272 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 554 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2021-12-21 18:04:55,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-21 18:04:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 184. [2021-12-21 18:04:55,429 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) [2021-12-21 18:04:55,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 200 transitions. [2021-12-21 18:04:55,430 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 200 transitions. Word has length 74 [2021-12-21 18:04:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:04:55,430 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 200 transitions. [2021-12-21 18:04:55,430 INFO L471 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) [2021-12-21 18:04:55,430 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 200 transitions. [2021-12-21 18:04:55,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 18:04:55,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:04:55,431 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:04:55,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-21 18:04:55,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:55,644 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:04:55,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:04:55,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639435, now seen corresponding path program 1 times [2021-12-21 18:04:55,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:04:55,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347136242] [2021-12-21 18:04:55,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:55,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:04:55,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:04:55,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [860166004] [2021-12-21 18:04:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:04:55,655 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:04:55,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:04:55,658 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) [2021-12-21 18:04:55,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 18:04:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:04:55,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 18:04:55,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:04:55,988 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:04:55,989 INFO L387 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 [2021-12-21 18:04:56,082 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:04:56,083 INFO L387 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 [2021-12-21 18:04:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 18:04:56,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:04:56,403 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:04:56,403 INFO L387 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 [2021-12-21 18:04:56,450 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 16 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 18:04:56,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:04:56,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347136242] [2021-12-21 18:04:56,450 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:04:56,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860166004] [2021-12-21 18:04:56,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860166004] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:04:56,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:04:56,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-12-21 18:04:56,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766838072] [2021-12-21 18:04:56,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:04:56,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:04:56,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:04:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:04:56,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:04:56,453 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) [2021-12-21 18:05:04,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:04,894 INFO L93 Difference]: Finished difference Result 243 states and 267 transitions. [2021-12-21 18:05:04,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 18:05:04,895 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 [2021-12-21 18:05:04,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:04,897 INFO L225 Difference]: With dead ends: 243 [2021-12-21 18:05:04,897 INFO L226 Difference]: Without dead ends: 243 [2021-12-21 18:05:04,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 131 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-12-21 18:05:04,898 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 203 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-21 18:05:04,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 1230 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 664 Invalid, 0 Unknown, 119 Unchecked, 0.3s Time] [2021-12-21 18:05:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-21 18:05:04,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 208. [2021-12-21 18:05:04,904 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) [2021-12-21 18:05:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 229 transitions. [2021-12-21 18:05:04,905 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 229 transitions. Word has length 75 [2021-12-21 18:05:04,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:04,906 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 229 transitions. [2021-12-21 18:05:04,906 INFO L471 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) [2021-12-21 18:05:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 229 transitions. [2021-12-21 18:05:04,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 18:05:04,910 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:04,910 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:04,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:05,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:05,119 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:05,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:05,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1167639436, now seen corresponding path program 1 times [2021-12-21 18:05:05,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:05,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560102146] [2021-12-21 18:05:05,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:05,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:05,136 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:05,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [830759961] [2021-12-21 18:05:05,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:05,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:05,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:05,137 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) [2021-12-21 18:05:05,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 18:05:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:05,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 70 conjunts are in the unsatisfiable core [2021-12-21 18:05:05,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:08,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:08,033 INFO L387 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 19 treesize of output 21 [2021-12-21 18:05:08,051 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:08,051 INFO L387 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 [2021-12-21 18:05:08,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:08,263 INFO L387 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 19 treesize of output 21 [2021-12-21 18:05:08,278 INFO L353 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-21 18:05:08,279 INFO L387 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 [2021-12-21 18:05:08,370 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 80 proven. 24 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-21 18:05:08,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:08,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:08,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560102146] [2021-12-21 18:05:08,470 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:08,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830759961] [2021-12-21 18:05:08,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830759961] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:08,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:08,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-21 18:05:08,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189201662] [2021-12-21 18:05:08,470 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:08,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 18:05:08,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:08,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 18:05:08,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=331, Unknown=1, NotChecked=0, Total=380 [2021-12-21 18:05:08,471 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) [2021-12-21 18:05:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:08,724 INFO L93 Difference]: Finished difference Result 222 states and 252 transitions. [2021-12-21 18:05:08,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:05:08,725 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 [2021-12-21 18:05:08,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:08,726 INFO L225 Difference]: With dead ends: 222 [2021-12-21 18:05:08,726 INFO L226 Difference]: Without dead ends: 222 [2021-12-21 18:05:08,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=84, Invalid=617, Unknown=1, NotChecked=0, Total=702 [2021-12-21 18:05:08,727 INFO L933 BasicCegarLoop]: 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 [2021-12-21 18:05:08,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 1504 Invalid, 1198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 1105 Unchecked, 0.1s Time] [2021-12-21 18:05:08,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-21 18:05:08,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-12-21 18:05:08,731 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) [2021-12-21 18:05:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 252 transitions. [2021-12-21 18:05:08,732 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 252 transitions. Word has length 75 [2021-12-21 18:05:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:08,732 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 252 transitions. [2021-12-21 18:05:08,732 INFO L471 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) [2021-12-21 18:05:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 252 transitions. [2021-12-21 18:05:08,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-21 18:05:08,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:08,733 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:08,756 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:08,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:08,934 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1045374201, now seen corresponding path program 1 times [2021-12-21 18:05:08,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:08,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587833788] [2021-12-21 18:05:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:08,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:08,949 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:08,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042044585] [2021-12-21 18:05:08,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:08,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:08,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:08,952 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) [2021-12-21 18:05:08,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 18:05:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:09,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-21 18:05:09,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:09,198 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 82 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 18:05:09,199 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:09,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:09,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587833788] [2021-12-21 18:05:09,199 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:09,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042044585] [2021-12-21 18:05:09,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042044585] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:09,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:09,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 18:05:09,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099549077] [2021-12-21 18:05:09,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:09,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 18:05:09,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:09,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 18:05:09,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 18:05:09,201 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) [2021-12-21 18:05:09,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:09,245 INFO L93 Difference]: Finished difference Result 200 states and 216 transitions. [2021-12-21 18:05:09,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 18:05:09,246 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 [2021-12-21 18:05:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:09,247 INFO L225 Difference]: With dead ends: 200 [2021-12-21 18:05:09,247 INFO L226 Difference]: Without dead ends: 185 [2021-12-21 18:05:09,247 INFO L932 BasicCegarLoop]: 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 [2021-12-21 18:05:09,248 INFO L933 BasicCegarLoop]: 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 [2021-12-21 18:05:09,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 874 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 18:05:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-12-21 18:05:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 175. [2021-12-21 18:05:09,250 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) [2021-12-21 18:05:09,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 190 transitions. [2021-12-21 18:05:09,251 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 190 transitions. Word has length 76 [2021-12-21 18:05:09,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:09,251 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 190 transitions. [2021-12-21 18:05:09,251 INFO L471 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) [2021-12-21 18:05:09,251 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 190 transitions. [2021-12-21 18:05:09,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-21 18:05:09,252 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:09,252 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:09,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:09,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-21 18:05:09,470 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:09,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:09,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1898289451, now seen corresponding path program 1 times [2021-12-21 18:05:09,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:09,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560185980] [2021-12-21 18:05:09,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:09,471 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:09,500 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:09,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1038409824] [2021-12-21 18:05:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:09,500 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:09,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:09,502 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) [2021-12-21 18:05:09,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 18:05:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:09,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 33 conjunts are in the unsatisfiable core [2021-12-21 18:05:09,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:09,862 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:09,863 INFO L387 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 [2021-12-21 18:05:09,966 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:09,966 INFO L387 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 [2021-12-21 18:05:09,980 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 18:05:09,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:10,267 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-21 18:05:10,267 INFO L387 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 [2021-12-21 18:05:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 107 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-21 18:05:10,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:10,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560185980] [2021-12-21 18:05:10,312 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:10,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038409824] [2021-12-21 18:05:10,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038409824] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:10,312 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:10,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-12-21 18:05:10,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103480867] [2021-12-21 18:05:10,312 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:10,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:05:10,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:10,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:05:10,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-12-21 18:05:10,313 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) [2021-12-21 18:05:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:18,764 INFO L93 Difference]: Finished difference Result 227 states and 248 transitions. [2021-12-21 18:05:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 18:05:18,764 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 [2021-12-21 18:05:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:18,765 INFO L225 Difference]: With dead ends: 227 [2021-12-21 18:05:18,765 INFO L226 Difference]: Without dead ends: 227 [2021-12-21 18:05:18,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 142 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=126, Invalid=474, Unknown=0, NotChecked=0, Total=600 [2021-12-21 18:05:18,766 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 202 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2021-12-21 18:05:18,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 1120 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 664 Invalid, 0 Unknown, 103 Unchecked, 0.3s Time] [2021-12-21 18:05:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-21 18:05:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 192. [2021-12-21 18:05:18,769 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) [2021-12-21 18:05:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 210 transitions. [2021-12-21 18:05:18,770 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 210 transitions. Word has length 81 [2021-12-21 18:05:18,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:18,770 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 210 transitions. [2021-12-21 18:05:18,770 INFO L471 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) [2021-12-21 18:05:18,771 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 210 transitions. [2021-12-21 18:05:18,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-21 18:05:18,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:18,772 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:18,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:18,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-21 18:05:18,989 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1898289452, now seen corresponding path program 2 times [2021-12-21 18:05:18,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:18,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068021622] [2021-12-21 18:05:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:18,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:19,002 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:19,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022501358] [2021-12-21 18:05:19,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:05:19,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:19,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:19,010 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) [2021-12-21 18:05:19,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-21 18:05:19,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:05:19,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:19,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 75 conjunts are in the unsatisfiable core [2021-12-21 18:05:19,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:19,363 INFO L387 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 [2021-12-21 18:05:19,635 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:19,636 INFO L387 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 [2021-12-21 18:05:19,639 INFO L387 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 [2021-12-21 18:05:19,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:19,802 INFO L387 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 [2021-12-21 18:05:19,807 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:19,807 INFO L387 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 [2021-12-21 18:05:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 118 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-21 18:05:19,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:19,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:19,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068021622] [2021-12-21 18:05:19,928 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:19,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022501358] [2021-12-21 18:05:19,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022501358] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:19,928 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:19,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-12-21 18:05:19,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392801287] [2021-12-21 18:05:19,928 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:19,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-21 18:05:19,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:19,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-21 18:05:19,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:05:19,929 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) [2021-12-21 18:05:20,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:20,444 INFO L93 Difference]: Finished difference Result 368 states and 398 transitions. [2021-12-21 18:05:20,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 18:05:20,445 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 [2021-12-21 18:05:20,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:20,446 INFO L225 Difference]: With dead ends: 368 [2021-12-21 18:05:20,446 INFO L226 Difference]: Without dead ends: 368 [2021-12-21 18:05:20,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-12-21 18:05:20,447 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 279 mSDsluCounter, 1129 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s 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 [2021-12-21 18:05:20,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 1244 Invalid, 1320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 941 Invalid, 0 Unknown, 368 Unchecked, 0.4s Time] [2021-12-21 18:05:20,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-12-21 18:05:20,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 195. [2021-12-21 18:05:20,451 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) [2021-12-21 18:05:20,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 213 transitions. [2021-12-21 18:05:20,451 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 213 transitions. Word has length 81 [2021-12-21 18:05:20,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:20,452 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 213 transitions. [2021-12-21 18:05:20,452 INFO L471 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) [2021-12-21 18:05:20,452 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 213 transitions. [2021-12-21 18:05:20,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-12-21 18:05:20,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:20,452 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:20,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:20,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-21 18:05:20,667 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:20,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:20,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1282569151, now seen corresponding path program 1 times [2021-12-21 18:05:20,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:20,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056711220] [2021-12-21 18:05:20,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:20,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:20,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:20,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946259489] [2021-12-21 18:05:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:20,682 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:20,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:20,683 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) [2021-12-21 18:05:20,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-21 18:05:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:20,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 18:05:20,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:20,934 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-21 18:05:20,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:20,957 INFO L387 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 [2021-12-21 18:05:21,069 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 44 proven. 11 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-12-21 18:05:21,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056711220] [2021-12-21 18:05:21,069 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946259489] [2021-12-21 18:05:21,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946259489] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 18:05:21,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 18:05:21,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-21 18:05:21,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370585845] [2021-12-21 18:05:21,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:21,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 18:05:21,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:21,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 18:05:21,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 18:05:21,070 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) [2021-12-21 18:05:21,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:21,267 INFO L93 Difference]: Finished difference Result 213 states and 237 transitions. [2021-12-21 18:05:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 18:05:21,268 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 [2021-12-21 18:05:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:21,269 INFO L225 Difference]: With dead ends: 213 [2021-12-21 18:05:21,269 INFO L226 Difference]: Without dead ends: 213 [2021-12-21 18:05:21,269 INFO L932 BasicCegarLoop]: 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 [2021-12-21 18:05:21,269 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 331 mSDsluCounter, 819 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:21,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 973 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 18:05:21,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-21 18:05:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 194. [2021-12-21 18:05:21,272 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) [2021-12-21 18:05:21,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 211 transitions. [2021-12-21 18:05:21,273 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 211 transitions. Word has length 82 [2021-12-21 18:05:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:21,273 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 211 transitions. [2021-12-21 18:05:21,273 INFO L471 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) [2021-12-21 18:05:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 211 transitions. [2021-12-21 18:05:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 18:05:21,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:21,274 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:21,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:21,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-21 18:05:21,485 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:21,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1350797929, now seen corresponding path program 1 times [2021-12-21 18:05:21,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:21,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545227466] [2021-12-21 18:05:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:21,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:21,502 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:21,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145109660] [2021-12-21 18:05:21,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:21,503 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:21,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:21,504 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) [2021-12-21 18:05:21,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-21 18:05:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:21,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 40 conjunts are in the unsatisfiable core [2021-12-21 18:05:21,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:21,823 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:21,823 INFO L387 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 [2021-12-21 18:05:21,902 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:21,902 INFO L387 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 [2021-12-21 18:05:21,993 INFO L353 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-21 18:05:21,994 INFO L387 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 [2021-12-21 18:05:22,018 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 97 proven. 55 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 18:05:22,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:22,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:22,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545227466] [2021-12-21 18:05:22,203 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:22,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145109660] [2021-12-21 18:05:22,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145109660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:22,203 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:22,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-12-21 18:05:22,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530613591] [2021-12-21 18:05:22,203 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:22,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-21 18:05:22,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:22,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-21 18:05:22,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-12-21 18:05:22,204 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) [2021-12-21 18:05:22,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:22,540 INFO L93 Difference]: Finished difference Result 276 states and 302 transitions. [2021-12-21 18:05:22,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 18:05:22,541 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 [2021-12-21 18:05:22,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:22,542 INFO L225 Difference]: With dead ends: 276 [2021-12-21 18:05:22,542 INFO L226 Difference]: Without dead ends: 276 [2021-12-21 18:05:22,542 INFO L932 BasicCegarLoop]: 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 [2021-12-21 18:05:22,542 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 158 mSDsluCounter, 1279 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:22,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 1422 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 647 Invalid, 0 Unknown, 271 Unchecked, 0.2s Time] [2021-12-21 18:05:22,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-21 18:05:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 240. [2021-12-21 18:05:22,546 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) [2021-12-21 18:05:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 267 transitions. [2021-12-21 18:05:22,547 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 267 transitions. Word has length 88 [2021-12-21 18:05:22,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:22,547 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 267 transitions. [2021-12-21 18:05:22,547 INFO L471 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) [2021-12-21 18:05:22,547 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 267 transitions. [2021-12-21 18:05:22,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-12-21 18:05:22,548 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:22,548 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:22,566 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:22,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 18:05:22,763 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:22,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:22,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1350797930, now seen corresponding path program 1 times [2021-12-21 18:05:22,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:22,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990463297] [2021-12-21 18:05:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:22,764 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:22,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:22,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1002482708] [2021-12-21 18:05:22,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:22,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:22,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:22,777 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) [2021-12-21 18:05:22,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-21 18:05:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-21 18:05:23,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:23,123 INFO L387 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 [2021-12-21 18:05:23,129 INFO L387 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 [2021-12-21 18:05:27,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:27,398 INFO L387 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 [2021-12-21 18:05:27,406 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:27,406 INFO L387 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 [2021-12-21 18:05:27,719 INFO L387 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 [2021-12-21 18:05:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 90 proven. 22 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-21 18:05:27,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:28,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990463297] [2021-12-21 18:05:28,365 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:28,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002482708] [2021-12-21 18:05:28,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002482708] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:28,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:28,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-21 18:05:28,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764908000] [2021-12-21 18:05:28,365 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:28,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 18:05:28,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:28,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 18:05:28,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:05:28,366 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) [2021-12-21 18:05:33,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:33,474 INFO L93 Difference]: Finished difference Result 276 states and 320 transitions. [2021-12-21 18:05:33,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 18:05:33,475 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 [2021-12-21 18:05:33,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:33,476 INFO L225 Difference]: With dead ends: 276 [2021-12-21 18:05:33,476 INFO L226 Difference]: Without dead ends: 264 [2021-12-21 18:05:33,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=83, Invalid=619, Unknown=0, NotChecked=0, Total=702 [2021-12-21 18:05:33,477 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 0 mSDsluCounter, 1096 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:33,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1268 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 386 Invalid, 0 Unknown, 450 Unchecked, 0.3s Time] [2021-12-21 18:05:33,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-21 18:05:33,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-12-21 18:05:33,482 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) [2021-12-21 18:05:33,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 300 transitions. [2021-12-21 18:05:33,483 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 300 transitions. Word has length 88 [2021-12-21 18:05:33,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:33,483 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 300 transitions. [2021-12-21 18:05:33,484 INFO L471 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) [2021-12-21 18:05:33,484 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 300 transitions. [2021-12-21 18:05:33,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-21 18:05:33,484 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:33,484 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:33,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:33,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-21 18:05:33,693 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:33,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1452318619, now seen corresponding path program 2 times [2021-12-21 18:05:33,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:33,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666646814] [2021-12-21 18:05:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:33,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:33,705 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:33,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1888010881] [2021-12-21 18:05:33,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:05:33,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:33,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:33,744 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) [2021-12-21 18:05:33,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-21 18:05:33,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:05:33,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:33,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 701 conjuncts, 93 conjunts are in the unsatisfiable core [2021-12-21 18:05:33,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:34,000 INFO L387 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 [2021-12-21 18:05:34,006 INFO L387 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 [2021-12-21 18:05:34,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:34,578 INFO L387 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 [2021-12-21 18:05:34,596 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:34,596 INFO L387 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 [2021-12-21 18:05:34,936 INFO L353 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-12-21 18:05:34,937 INFO L387 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 [2021-12-21 18:05:34,945 INFO L387 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 [2021-12-21 18:05:35,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:35,211 INFO L387 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 [2021-12-21 18:05:35,232 INFO L353 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-12-21 18:05:35,233 INFO L387 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 [2021-12-21 18:05:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 103 proven. 39 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-12-21 18:05:35,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:35,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:35,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666646814] [2021-12-21 18:05:35,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:35,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888010881] [2021-12-21 18:05:35,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1888010881] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:35,512 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:35,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-12-21 18:05:35,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670529252] [2021-12-21 18:05:35,513 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:35,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-21 18:05:35,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:35,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-21 18:05:35,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-12-21 18:05:35,514 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) [2021-12-21 18:05:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:36,259 INFO L93 Difference]: Finished difference Result 318 states and 356 transitions. [2021-12-21 18:05:36,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 18:05:36,260 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 [2021-12-21 18:05:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:36,262 INFO L225 Difference]: With dead ends: 318 [2021-12-21 18:05:36,262 INFO L226 Difference]: Without dead ends: 303 [2021-12-21 18:05:36,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-12-21 18:05:36,262 INFO L933 BasicCegarLoop]: 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, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 18:05:36,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 1311 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 483 Invalid, 0 Unknown, 631 Unchecked, 0.4s Time] [2021-12-21 18:05:36,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-12-21 18:05:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 283. [2021-12-21 18:05:36,267 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) [2021-12-21 18:05:36,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 312 transitions. [2021-12-21 18:05:36,267 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 312 transitions. Word has length 89 [2021-12-21 18:05:36,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:36,268 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 312 transitions. [2021-12-21 18:05:36,268 INFO L471 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) [2021-12-21 18:05:36,268 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 312 transitions. [2021-12-21 18:05:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 18:05:36,268 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:36,268 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:36,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-21 18:05:36,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:36,479 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:36,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:36,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2072204227, now seen corresponding path program 1 times [2021-12-21 18:05:36,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:36,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459171137] [2021-12-21 18:05:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:36,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:36,492 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:36,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186528321] [2021-12-21 18:05:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:36,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:36,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:36,493 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) [2021-12-21 18:05:36,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-21 18:05:36,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:36,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 18:05:36,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:36,754 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2021-12-21 18:05:36,754 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 18:05:36,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:36,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459171137] [2021-12-21 18:05:36,755 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:36,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186528321] [2021-12-21 18:05:36,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186528321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 18:05:36,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 18:05:36,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 18:05:36,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630375421] [2021-12-21 18:05:36,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 18:05:36,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 18:05:36,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 18:05:36,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-21 18:05:36,756 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) [2021-12-21 18:05:36,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:36,853 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2021-12-21 18:05:36,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 18:05:36,854 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 [2021-12-21 18:05:36,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:36,855 INFO L225 Difference]: With dead ends: 322 [2021-12-21 18:05:36,855 INFO L226 Difference]: Without dead ends: 322 [2021-12-21 18:05:36,855 INFO L932 BasicCegarLoop]: 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 [2021-12-21 18:05:36,856 INFO L933 BasicCegarLoop]: 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 [2021-12-21 18:05:36,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 273 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 18:05:36,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-12-21 18:05:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 282. [2021-12-21 18:05:36,860 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) [2021-12-21 18:05:36,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 311 transitions. [2021-12-21 18:05:36,861 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 311 transitions. Word has length 90 [2021-12-21 18:05:36,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:36,861 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 311 transitions. [2021-12-21 18:05:36,861 INFO L471 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) [2021-12-21 18:05:36,861 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 311 transitions. [2021-12-21 18:05:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 18:05:36,862 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:36,862 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:36,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:37,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-21 18:05:37,075 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -2072204226, now seen corresponding path program 1 times [2021-12-21 18:05:37,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211762859] [2021-12-21 18:05:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:37,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:37,092 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:37,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171664943] [2021-12-21 18:05:37,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:37,092 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:37,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:37,093 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) [2021-12-21 18:05:37,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-21 18:05:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 18:05:37,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 709 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-21 18:05:37,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:37,356 INFO L387 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 [2021-12-21 18:05:37,366 INFO L387 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 [2021-12-21 18:05:38,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:38,518 INFO L387 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 [2021-12-21 18:05:38,534 INFO L353 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-12-21 18:05:38,534 INFO L387 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 [2021-12-21 18:05:38,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 18:05:38,824 INFO L387 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 [2021-12-21 18:05:38,834 INFO L353 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-21 18:05:38,835 INFO L387 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 [2021-12-21 18:05:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 108 proven. 51 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-12-21 18:05:40,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 18:05:40,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 18:05:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211762859] [2021-12-21 18:05:40,763 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-21 18:05:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171664943] [2021-12-21 18:05:40,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171664943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 18:05:40,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-21 18:05:40,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-12-21 18:05:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179790220] [2021-12-21 18:05:40,763 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-21 18:05:40,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 18:05:40,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 18:05:40,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 18:05:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2021-12-21 18:05:40,764 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) [2021-12-21 18:05:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 18:05:41,736 INFO L93 Difference]: Finished difference Result 376 states and 439 transitions. [2021-12-21 18:05:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-21 18:05:41,748 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 [2021-12-21 18:05:41,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 18:05:41,749 INFO L225 Difference]: With dead ends: 376 [2021-12-21 18:05:41,749 INFO L226 Difference]: Without dead ends: 376 [2021-12-21 18:05:41,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-12-21 18:05:41,750 INFO L933 BasicCegarLoop]: 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 [2021-12-21 18:05:41,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 1783 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 1218 Unchecked, 0.1s Time] [2021-12-21 18:05:41,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-12-21 18:05:41,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 337. [2021-12-21 18:05:41,762 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) [2021-12-21 18:05:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 388 transitions. [2021-12-21 18:05:41,763 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 388 transitions. Word has length 90 [2021-12-21 18:05:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 18:05:41,763 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 388 transitions. [2021-12-21 18:05:41,764 INFO L471 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) [2021-12-21 18:05:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 388 transitions. [2021-12-21 18:05:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 18:05:41,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 18:05:41,765 INFO L514 BasicCegarLoop]: 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] [2021-12-21 18:05:41,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-12-21 18:05:41,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 18:05:41,984 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 66 more)] === [2021-12-21 18:05:41,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 18:05:41,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1015753557, now seen corresponding path program 2 times [2021-12-21 18:05:41,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 18:05:41,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729771961] [2021-12-21 18:05:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 18:05:41,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 18:05:42,005 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-21 18:05:42,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762636432] [2021-12-21 18:05:42,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 18:05:42,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 18:05:42,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 18:05:42,020 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) [2021-12-21 18:05:42,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-12-21 18:05:42,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 18:05:42,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 18:05:42,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 88 conjunts are in the unsatisfiable core [2021-12-21 18:05:42,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 18:05:42,398 INFO L387 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 [2021-12-21 18:05:42,406 INFO L387 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