./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array8_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array8_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-17 05:10:28,661 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 05:10:28,663 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 05:10:28,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 05:10:28,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 05:10:28,712 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 05:10:28,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 05:10:28,717 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 05:10:28,719 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 05:10:28,723 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 05:10:28,724 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 05:10:28,726 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 05:10:28,727 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 05:10:28,729 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 05:10:28,730 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 05:10:28,731 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 05:10:28,732 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 05:10:28,733 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 05:10:28,735 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 05:10:28,739 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 05:10:28,741 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 05:10:28,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 05:10:28,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 05:10:28,744 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 05:10:28,751 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 05:10:28,752 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 05:10:28,752 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 05:10:28,753 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 05:10:28,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 05:10:28,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 05:10:28,755 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 05:10:28,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 05:10:28,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 05:10:28,757 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 05:10:28,758 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 05:10:28,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 05:10:28,759 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 05:10:28,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 05:10:28,760 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 05:10:28,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 05:10:28,762 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 05:10:28,763 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 05:10:28,796 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 05:10:28,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 05:10:28,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 05:10:28,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 05:10:28,797 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 05:10:28,798 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 05:10:28,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 05:10:28,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 05:10:28,799 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 05:10:28,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 05:10:28,800 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 05:10:28,800 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 05:10:28,800 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 05:10:28,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 05:10:28,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 05:10:28,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 05:10:28,801 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 05:10:28,801 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 05:10:28,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 05:10:28,801 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 05:10:28,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 05:10:28,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 05:10:28,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 05:10:28,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 05:10:28,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:10:28,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 05:10:28,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 05:10:28,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 05:10:28,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 05:10:28,803 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 05:10:28,803 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 05:10:28,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 05:10:28,804 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 05:10:28,804 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 05:10:28,804 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 05:10:28,804 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 06625eaf591a62e295090a882d83c1e11aaafca7ac8895e7d4adcf51d5b26e02 [2023-02-17 05:10:29,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 05:10:29,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 05:10:29,056 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 05:10:29,057 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 05:10:29,057 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 05:10:29,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array8_pattern.c [2023-02-17 05:10:30,222 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 05:10:30,369 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 05:10:30,370 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c [2023-02-17 05:10:30,375 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bef3ccb36/b5eae605ae2f4e2e9f4aeb9ffcb1f440/FLAGcf174cd05 [2023-02-17 05:10:30,384 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bef3ccb36/b5eae605ae2f4e2e9f4aeb9ffcb1f440 [2023-02-17 05:10:30,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 05:10:30,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 05:10:30,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 05:10:30,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 05:10:30,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 05:10:30,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e382bd9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30, skipping insertion in model container [2023-02-17 05:10:30,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 05:10:30,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 05:10:30,551 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2023-02-17 05:10:30,578 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:10:30,588 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 05:10:30,601 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array8_pattern.c[1321,1334] [2023-02-17 05:10:30,624 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 05:10:30,635 INFO L208 MainTranslator]: Completed translation [2023-02-17 05:10:30,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30 WrapperNode [2023-02-17 05:10:30,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 05:10:30,637 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 05:10:30,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 05:10:30,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 05:10:30,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,651 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,672 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-02-17 05:10:30,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 05:10:30,673 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 05:10:30,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 05:10:30,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 05:10:30,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,682 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,682 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,692 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,693 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 05:10:30,696 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 05:10:30,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 05:10:30,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 05:10:30,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (1/1) ... [2023-02-17 05:10:30,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 05:10:30,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:10:30,738 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) [2023-02-17 05:10:30,752 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 [2023-02-17 05:10:30,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 05:10:30,777 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 05:10:30,778 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 05:10:30,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 05:10:30,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 05:10:30,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 05:10:30,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 05:10:30,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 05:10:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 05:10:30,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 05:10:30,836 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 05:10:30,838 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 05:10:31,089 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 05:10:31,094 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 05:10:31,095 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-17 05:10:31,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:10:31 BoogieIcfgContainer [2023-02-17 05:10:31,115 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 05:10:31,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 05:10:31,117 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 05:10:31,120 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 05:10:31,137 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 05:10:30" (1/3) ... [2023-02-17 05:10:31,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51737b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:10:31, skipping insertion in model container [2023-02-17 05:10:31,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 05:10:30" (2/3) ... [2023-02-17 05:10:31,138 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51737b00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 05:10:31, skipping insertion in model container [2023-02-17 05:10:31,138 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 05:10:31" (3/3) ... [2023-02-17 05:10:31,140 INFO L112 eAbstractionObserver]: Analyzing ICFG array8_pattern.c [2023-02-17 05:10:31,173 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 05:10:31,173 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 05:10:31,231 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 05:10:31,238 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@15bd4d33, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 05:10:31,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 05:10:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:10:31,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-17 05:10:31,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:10:31,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:10:31,255 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:10:31,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:10:31,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1127586545, now seen corresponding path program 1 times [2023-02-17 05:10:31,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:10:31,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863130815] [2023-02-17 05:10:31,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:31,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:10:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:10:31,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 05:10:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:10:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:10:31,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:10:31,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863130815] [2023-02-17 05:10:31,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863130815] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:10:31,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:10:31,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 05:10:31,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679830404] [2023-02-17 05:10:31,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:10:31,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 05:10:31,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:10:31,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 05:10:31,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 05:10:31,526 INFO L87 Difference]: Start difference. First operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 05:10:31,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:10:31,543 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2023-02-17 05:10:31,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 05:10:31,545 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-02-17 05:10:31,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:10:31,551 INFO L225 Difference]: With dead ends: 53 [2023-02-17 05:10:31,551 INFO L226 Difference]: Without dead ends: 24 [2023-02-17 05:10:31,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 05:10:31,558 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2023-02-17 05:10:31,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 05:10:31,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-17 05:10:31,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-02-17 05:10:31,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:10:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-02-17 05:10:31,602 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2023-02-17 05:10:31,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:10:31,603 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-02-17 05:10:31,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-17 05:10:31,604 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-02-17 05:10:31,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-17 05:10:31,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:10:31,606 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:10:31,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 05:10:31,608 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:10:31,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:10:31,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1008571545, now seen corresponding path program 1 times [2023-02-17 05:10:31,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:10:31,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569210675] [2023-02-17 05:10:31,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:31,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:10:31,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 05:10:31,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143306180] [2023-02-17 05:10:31,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:31,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:31,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:10:31,673 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) [2023-02-17 05:10:31,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 05:10:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:10:31,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 05:10:31,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:10:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:10:31,827 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 05:10:31,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:10:31,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569210675] [2023-02-17 05:10:31,828 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 05:10:31,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143306180] [2023-02-17 05:10:31,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143306180] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 05:10:31,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 05:10:31,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 05:10:31,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123399350] [2023-02-17 05:10:31,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 05:10:31,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 05:10:31,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:10:31,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 05:10:31,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-02-17 05:10:31,838 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:10:31,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:10:31,904 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2023-02-17 05:10:31,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 05:10:31,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-02-17 05:10:31,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:10:31,906 INFO L225 Difference]: With dead ends: 50 [2023-02-17 05:10:31,906 INFO L226 Difference]: Without dead ends: 32 [2023-02-17 05:10:31,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-02-17 05:10:31,907 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 05:10:31,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 60 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 05:10:31,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-17 05:10:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2023-02-17 05:10:31,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:10:31,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-02-17 05:10:31,914 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2023-02-17 05:10:31,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:10:31,914 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-02-17 05:10:31,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:10:31,915 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-02-17 05:10:31,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 05:10:31,915 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:10:31,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:10:31,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 05:10:32,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:32,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:10:32,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:10:32,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1890411897, now seen corresponding path program 1 times [2023-02-17 05:10:32,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:10:32,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604181325] [2023-02-17 05:10:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:32,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:10:32,145 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 05:10:32,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166768024] [2023-02-17 05:10:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:32,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:32,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:10:32,149 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) [2023-02-17 05:10:32,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 05:10:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:10:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 05:10:32,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:10:32,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-17 05:10:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:10:32,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-17 05:10:32,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-17 05:10:32,374 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-17 05:10:32,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-17 05:10:32,540 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:10:32,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 76 [2023-02-17 05:10:32,606 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:10:32,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 101 treesize of output 134 [2023-02-17 05:10:32,814 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:10:32,815 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 1 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 248 treesize of output 304 [2023-02-17 05:10:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:10:36,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:10:36,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:10:36,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604181325] [2023-02-17 05:10:36,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 05:10:36,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166768024] [2023-02-17 05:10:36,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166768024] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 05:10:36,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 05:10:36,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 05:10:36,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230875235] [2023-02-17 05:10:36,484 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 05:10:36,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 05:10:36,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:10:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 05:10:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2023-02-17 05:10:36,489 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:10:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:10:36,859 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2023-02-17 05:10:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-17 05:10:36,859 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-02-17 05:10:36,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:10:36,860 INFO L225 Difference]: With dead ends: 56 [2023-02-17 05:10:36,861 INFO L226 Difference]: Without dead ends: 52 [2023-02-17 05:10:36,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2023-02-17 05:10:36,862 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 05:10:36,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 117 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 05:10:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-17 05:10:36,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2023-02-17 05:10:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-17 05:10:36,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-02-17 05:10:36,871 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 29 [2023-02-17 05:10:36,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:10:36,871 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-02-17 05:10:36,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 05:10:36,872 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-02-17 05:10:36,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 05:10:36,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:10:36,873 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:10:36,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 05:10:37,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-17 05:10:37,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:10:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:10:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1497384887, now seen corresponding path program 1 times [2023-02-17 05:10:37,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:10:37,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836667478] [2023-02-17 05:10:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:37,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:10:37,102 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 05:10:37,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1849437902] [2023-02-17 05:10:37,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:37,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:37,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:10:37,104 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) [2023-02-17 05:10:37,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 05:10:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 05:10:37,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 05:10:37,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:10:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 05:10:37,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:10:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 05:10:37,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:10:37,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836667478] [2023-02-17 05:10:37,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 05:10:37,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849437902] [2023-02-17 05:10:37,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849437902] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:10:37,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:10:37,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-02-17 05:10:37,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239859297] [2023-02-17 05:10:37,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:10:37,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 05:10:37,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:10:37,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 05:10:37,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-02-17 05:10:37,270 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 05:10:37,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:10:37,450 INFO L93 Difference]: Finished difference Result 123 states and 136 transitions. [2023-02-17 05:10:37,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-17 05:10:37,451 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-02-17 05:10:37,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:10:37,452 INFO L225 Difference]: With dead ends: 123 [2023-02-17 05:10:37,452 INFO L226 Difference]: Without dead ends: 105 [2023-02-17 05:10:37,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2023-02-17 05:10:37,454 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 87 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:10:37,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 99 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:10:37,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-17 05:10:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 66. [2023-02-17 05:10:37,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 55 states have (on average 1.1636363636363636) internal successors, (64), 55 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 05:10:37,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2023-02-17 05:10:37,468 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 29 [2023-02-17 05:10:37,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:10:37,468 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2023-02-17 05:10:37,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 05:10:37,468 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2023-02-17 05:10:37,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 05:10:37,469 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:10:37,469 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:10:37,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 05:10:37,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:37,676 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:10:37,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:10:37,677 INFO L85 PathProgramCache]: Analyzing trace with hash -32099493, now seen corresponding path program 2 times [2023-02-17 05:10:37,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:10:37,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659318695] [2023-02-17 05:10:37,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:37,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:10:37,697 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 05:10:37,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635641326] [2023-02-17 05:10:37,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 05:10:37,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:37,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:10:37,708 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) [2023-02-17 05:10:37,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 05:10:37,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 05:10:37,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:10:37,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 05:10:37,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:10:37,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:10:37,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:10:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:10:37,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:10:37,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659318695] [2023-02-17 05:10:37,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 05:10:37,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635641326] [2023-02-17 05:10:37,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635641326] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:10:37,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:10:37,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-17 05:10:37,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728945562] [2023-02-17 05:10:37,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:10:37,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 05:10:37,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:10:37,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 05:10:37,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 05:10:37,827 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 05:10:37,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:10:37,927 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2023-02-17 05:10:37,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 05:10:37,928 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-17 05:10:37,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:10:37,932 INFO L225 Difference]: With dead ends: 93 [2023-02-17 05:10:37,933 INFO L226 Difference]: Without dead ends: 83 [2023-02-17 05:10:37,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-17 05:10:37,937 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 49 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 05:10:37,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 91 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 05:10:37,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-17 05:10:37,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 70. [2023-02-17 05:10:37,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 59 states have internal predecessors, (67), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-17 05:10:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2023-02-17 05:10:37,957 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 31 [2023-02-17 05:10:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:10:37,958 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2023-02-17 05:10:37,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 05:10:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2023-02-17 05:10:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 05:10:37,959 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:10:37,959 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:10:37,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 05:10:38,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:38,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:10:38,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:10:38,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1464847157, now seen corresponding path program 2 times [2023-02-17 05:10:38,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:10:38,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96664865] [2023-02-17 05:10:38,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:38,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:10:38,189 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 05:10:38,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802797330] [2023-02-17 05:10:38,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 05:10:38,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:38,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:10:38,191 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) [2023-02-17 05:10:38,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 05:10:38,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 05:10:38,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:10:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-17 05:10:38,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:10:38,275 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 05:10:38,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 05:10:38,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 05:10:38,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 05:10:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96664865] [2023-02-17 05:10:38,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 05:10:38,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802797330] [2023-02-17 05:10:38,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802797330] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 05:10:38,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 05:10:38,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-17 05:10:38,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130867762] [2023-02-17 05:10:38,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 05:10:38,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 05:10:38,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 05:10:38,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 05:10:38,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-17 05:10:38,302 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 05:10:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 05:10:38,378 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2023-02-17 05:10:38,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 05:10:38,379 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2023-02-17 05:10:38,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 05:10:38,380 INFO L225 Difference]: With dead ends: 82 [2023-02-17 05:10:38,380 INFO L226 Difference]: Without dead ends: 78 [2023-02-17 05:10:38,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2023-02-17 05:10:38,381 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 48 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 05:10:38,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 102 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 05:10:38,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-17 05:10:38,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2023-02-17 05:10:38,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.12) internal successors, (56), 50 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-17 05:10:38,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2023-02-17 05:10:38,389 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 31 [2023-02-17 05:10:38,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 05:10:38,390 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2023-02-17 05:10:38,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 05:10:38,390 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2023-02-17 05:10:38,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 05:10:38,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 05:10:38,391 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 05:10:38,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 05:10:38,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:38,604 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 05:10:38,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 05:10:38,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1236086951, now seen corresponding path program 3 times [2023-02-17 05:10:38,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 05:10:38,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502816483] [2023-02-17 05:10:38,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 05:10:38,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 05:10:38,630 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 05:10:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872182618] [2023-02-17 05:10:38,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 05:10:38,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 05:10:38,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 05:10:38,632 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) [2023-02-17 05:10:38,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 05:10:38,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 05:10:38,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 05:10:38,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-17 05:10:38,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 05:10:38,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-17 05:10:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:10:38,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 31 [2023-02-17 05:10:38,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2023-02-17 05:10:38,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-17 05:10:38,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-02-17 05:10:38,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:10:38,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:10:38,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 51 [2023-02-17 05:10:38,896 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:10:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 05:10:38,898 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:10:38,898 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:10:38,899 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 05:10:38,900 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 05:10:38,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 112 treesize of output 462