./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/simple_4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/loop-acceleration/simple_4-1.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 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 23:54:03,723 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 23:54:03,725 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 23:54:03,763 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 23:54:03,763 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 23:54:03,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 23:54:03,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 23:54:03,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 23:54:03,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 23:54:03,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 23:54:03,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 23:54:03,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 23:54:03,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 23:54:03,782 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 23:54:03,783 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 23:54:03,784 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 23:54:03,785 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 23:54:03,786 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 23:54:03,787 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 23:54:03,792 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 23:54:03,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 23:54:03,794 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 23:54:03,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 23:54:03,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 23:54:03,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 23:54:03,803 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 23:54:03,803 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 23:54:03,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 23:54:03,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 23:54:03,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 23:54:03,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 23:54:03,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 23:54:03,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 23:54:03,809 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 23:54:03,810 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 23:54:03,810 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 23:54:03,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 23:54:03,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 23:54:03,811 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 23:54:03,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 23:54:03,813 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 23:54:03,814 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 23:54:03,852 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 23:54:03,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 23:54:03,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 23:54:03,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 23:54:03,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 23:54:03,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 23:54:03,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 23:54:03,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 23:54:03,855 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 23:54:03,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 23:54:03,856 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 23:54:03,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 23:54:03,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 23:54:03,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 23:54:03,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 23:54:03,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 23:54:03,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 23:54:03,857 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 23:54:03,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 23:54:03,858 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 23:54:03,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 23:54:03,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 23:54:03,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 23:54:03,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 23:54:03,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:54:03,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 23:54:03,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 23:54:03,859 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 23:54:03,859 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 23:54:03,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 23:54:03,860 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 23:54:03,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 23:54:03,860 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 23:54:03,860 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 23:54:03,861 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 23:54:03,861 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9950a3ef699b75b517ce9b65b2c32dbbe13ac0a027bb7e02ceeaeee924f6aade [2023-02-13 23:54:04,117 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 23:54:04,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 23:54:04,141 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 23:54:04,142 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 23:54:04,142 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 23:54:04,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/simple_4-1.c [2023-02-13 23:54:05,264 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 23:54:05,425 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 23:54:05,426 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/simple_4-1.c [2023-02-13 23:54:05,430 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/843ffbb0a/280311088469455ba70a7c6d7a95b2f9/FLAGe464e02e1 [2023-02-13 23:54:05,447 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/843ffbb0a/280311088469455ba70a7c6d7a95b2f9 [2023-02-13 23:54:05,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 23:54:05,451 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 23:54:05,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 23:54:05,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 23:54:05,456 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 23:54:05,457 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,458 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f5ad12a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05, skipping insertion in model container [2023-02-13 23:54:05,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 23:54:05,475 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 23:54:05,577 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/loop-acceleration/simple_4-1.c[322,335] [2023-02-13 23:54:05,587 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:54:05,594 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 23:54:05,603 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/loop-acceleration/simple_4-1.c[322,335] [2023-02-13 23:54:05,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:54:05,615 INFO L208 MainTranslator]: Completed translation [2023-02-13 23:54:05,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05 WrapperNode [2023-02-13 23:54:05,616 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 23:54:05,616 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 23:54:05,617 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 23:54:05,617 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 23:54:05,622 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,639 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 23 [2023-02-13 23:54:05,639 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 23:54:05,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 23:54:05,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 23:54:05,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 23:54:05,647 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,647 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,648 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,649 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,652 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,654 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 23:54:05,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 23:54:05,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 23:54:05,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 23:54:05,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (1/1) ... [2023-02-13 23:54:05,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:54:05,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:54:05,685 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) [2023-02-13 23:54:05,687 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 [2023-02-13 23:54:05,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 23:54:05,716 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 23:54:05,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 23:54:05,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 23:54:05,765 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 23:54:05,768 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 23:54:05,829 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 23:54:05,834 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 23:54:05,834 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-13 23:54:05,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:54:05 BoogieIcfgContainer [2023-02-13 23:54:05,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 23:54:05,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 23:54:05,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 23:54:05,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 23:54:05,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 11:54:05" (1/3) ... [2023-02-13 23:54:05,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488dadcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:54:05, skipping insertion in model container [2023-02-13 23:54:05,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:54:05" (2/3) ... [2023-02-13 23:54:05,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@488dadcf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:54:05, skipping insertion in model container [2023-02-13 23:54:05,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:54:05" (3/3) ... [2023-02-13 23:54:05,844 INFO L112 eAbstractionObserver]: Analyzing ICFG simple_4-1.c [2023-02-13 23:54:05,859 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 23:54:05,859 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 23:54:05,912 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 23:54:05,922 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;@676f9635, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 23:54:05,923 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 23:54:05,927 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 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) [2023-02-13 23:54:05,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-13 23:54:05,933 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:54:05,934 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-13 23:54:05,935 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:54:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:54:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2023-02-13 23:54:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:54:05,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019980879] [2023-02-13 23:54:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:54:05,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:54:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:54:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:06,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:54:06,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019980879] [2023-02-13 23:54:06,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019980879] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:54:06,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:54:06,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:54:06,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068564483] [2023-02-13 23:54:06,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:54:06,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:54:06,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:54:06,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:54:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:54:06,308 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:54:06,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:54:06,334 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-02-13 23:54:06,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:54:06,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-13 23:54:06,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:54:06,344 INFO L225 Difference]: With dead ends: 20 [2023-02-13 23:54:06,344 INFO L226 Difference]: Without dead ends: 8 [2023-02-13 23:54:06,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:54:06,351 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:54:06,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:54:06,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-02-13 23:54:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-02-13 23:54:06,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2023-02-13 23:54:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-02-13 23:54:06,389 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2023-02-13 23:54:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:54:06,390 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-02-13 23:54:06,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:54:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-02-13 23:54:06,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-13 23:54:06,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:54:06,391 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:54:06,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 23:54:06,391 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:54:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:54:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2023-02-13 23:54:06,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:54:06,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525636332] [2023-02-13 23:54:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:54:06,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:54:06,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:54:06,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:06,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:54:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525636332] [2023-02-13 23:54:06,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525636332] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:54:06,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57946179] [2023-02-13 23:54:06,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:54:06,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:54:06,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:54:06,497 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) [2023-02-13 23:54:06,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 23:54:06,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:54:06,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-13 23:54:06,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:54:06,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:06,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:54:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:06,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57946179] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:54:06,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:54:06,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 23:54:06,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630051569] [2023-02-13 23:54:06,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:54:06,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:54:06,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:54:06,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:54:06,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:54:06,674 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-02-13 23:54:06,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:54:06,703 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2023-02-13 23:54:06,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-13 23:54:06,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 7 [2023-02-13 23:54:06,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:54:06,705 INFO L225 Difference]: With dead ends: 15 [2023-02-13 23:54:06,705 INFO L226 Difference]: Without dead ends: 11 [2023-02-13 23:54:06,705 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-13 23:54:06,706 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:54:06,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 9 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:54:06,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-13 23:54:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-13 23:54:06,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:54:06,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-02-13 23:54:06,711 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2023-02-13 23:54:06,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:54:06,711 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-02-13 23:54:06,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-02-13 23:54:06,712 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-02-13 23:54:06,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-13 23:54:06,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:54:06,712 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-02-13 23:54:06,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-13 23:54:06,918 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 [2023-02-13 23:54:06,918 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:54:06,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:54:06,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2023-02-13 23:54:06,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:54:06,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766485053] [2023-02-13 23:54:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:54:06,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:54:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:54:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:07,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:54:07,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766485053] [2023-02-13 23:54:07,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766485053] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:54:07,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6938942] [2023-02-13 23:54:07,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 23:54:07,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:54:07,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:54:07,250 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) [2023-02-13 23:54:07,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 23:54:07,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 23:54:07,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:54:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-13 23:54:07,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:54:07,397 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:07,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:54:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:07,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6938942] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:54:07,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:54:07,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-13 23:54:07,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914219021] [2023-02-13 23:54:07,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:54:07,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-13 23:54:07,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:54:07,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-13 23:54:07,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-02-13 23:54:07,494 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:54:07,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:54:07,796 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2023-02-13 23:54:07,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-13 23:54:07,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-13 23:54:07,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:54:07,797 INFO L225 Difference]: With dead ends: 21 [2023-02-13 23:54:07,797 INFO L226 Difference]: Without dead ends: 17 [2023-02-13 23:54:07,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2023-02-13 23:54:07,798 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:54:07,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 15 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:54:07,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-13 23:54:07,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-13 23:54:07,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 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) [2023-02-13 23:54:07,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-02-13 23:54:07,805 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2023-02-13 23:54:07,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:54:07,805 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-02-13 23:54:07,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:54:07,805 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-02-13 23:54:07,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 23:54:07,806 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:54:07,806 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-02-13 23:54:07,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-13 23:54:08,010 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 [2023-02-13 23:54:08,011 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:54:08,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:54:08,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2023-02-13 23:54:08,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:54:08,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688543687] [2023-02-13 23:54:08,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:54:08,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:54:08,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:54:08,346 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:08,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:54:08,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688543687] [2023-02-13 23:54:08,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688543687] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:54:08,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853739213] [2023-02-13 23:54:08,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 23:54:08,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:54:08,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:54:08,355 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) [2023-02-13 23:54:08,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 23:54:08,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-13 23:54:08,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:54:08,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-13 23:54:08,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:54:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:08,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:54:08,786 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:08,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853739213] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:54:08,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:54:08,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-13 23:54:08,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119357940] [2023-02-13 23:54:08,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:54:08,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-13 23:54:08,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:54:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-13 23:54:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2023-02-13 23:54:08,789 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2023-02-13 23:54:14,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:54:14,914 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-02-13 23:54:14,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-13 23:54:14,914 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 16 [2023-02-13 23:54:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:54:14,915 INFO L225 Difference]: With dead ends: 33 [2023-02-13 23:54:14,915 INFO L226 Difference]: Without dead ends: 29 [2023-02-13 23:54:14,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=465, Invalid=795, Unknown=0, NotChecked=0, Total=1260 [2023-02-13 23:54:14,917 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 30 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 23:54:14,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 24 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 23:54:14,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-13 23:54:14,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-13 23:54:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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) [2023-02-13 23:54:14,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2023-02-13 23:54:14,927 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2023-02-13 23:54:14,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:54:14,927 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2023-02-13 23:54:14,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2023-02-13 23:54:14,928 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2023-02-13 23:54:14,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-13 23:54:14,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:54:14,929 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-02-13 23:54:14,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 23:54:15,134 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 [2023-02-13 23:54:15,134 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:54:15,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:54:15,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 4 times [2023-02-13 23:54:15,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:54:15,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569951957] [2023-02-13 23:54:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:54:15,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:54:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:54:15,719 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:15,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:54:15,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569951957] [2023-02-13 23:54:15,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569951957] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:54:15,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274353061] [2023-02-13 23:54:15,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 23:54:15,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:54:15,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:54:15,721 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) [2023-02-13 23:54:15,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 23:54:15,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 23:54:15,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:54:15,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-13 23:54:15,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:54:15,909 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:15,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:54:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:54:16,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274353061] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:54:16,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:54:16,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-13 23:54:16,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529885087] [2023-02-13 23:54:16,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:54:16,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-13 23:54:16,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:54:16,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-13 23:54:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=1682, Unknown=0, NotChecked=0, Total=2352 [2023-02-13 23:54:16,880 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2023-02-13 23:54:19,117 WARN L837 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967252) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967256) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967254) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-02-13 23:54:21,127 WARN L837 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967256) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967254) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-02-13 23:55:00,694 WARN L233 SmtUtils]: Spent 32.67s on a formula simplification that was a NOOP. DAG size: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:55:02,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-13 23:55:04,553 WARN L837 $PredicateComparison]: unable to prove that (and (< 1 (mod (+ 4294967276 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967264) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967268) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967258) 4294967296)) (< 1 (mod (+ 4294967274 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967272 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967290) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967262) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967284) 4294967296)) (< 1 (mod (+ 4294967260 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ 4294967292 |c_ULTIMATE.start_main_~x~0#1|) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967270) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967266) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967286) 4294967296)) (< 1 (mod |c_ULTIMATE.start_main_~x~0#1| 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967278) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967288) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967280) 4294967296)) (< 1 (mod (+ |c_ULTIMATE.start_main_~x~0#1| 4294967294) 4294967296)) (< 1 (mod (+ 4294967282 |c_ULTIMATE.start_main_~x~0#1|) 4294967296))) is different from false [2023-02-13 23:55:29,657 WARN L233 SmtUtils]: Spent 16.60s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:55:53,623 WARN L233 SmtUtils]: Spent 14.98s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:56:17,224 WARN L233 SmtUtils]: Spent 12.65s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:56:33,938 WARN L233 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:56:45,958 WARN L233 SmtUtils]: Spent 6.91s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:56:56,430 WARN L233 SmtUtils]: Spent 7.88s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:58:03,423 WARN L233 SmtUtils]: Spent 30.09s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:58:04,567 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-02-13 23:58:06,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:58:06,398 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2023-02-13 23:58:06,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-13 23:58:06,402 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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 28 [2023-02-13 23:58:06,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:58:06,403 INFO L225 Difference]: With dead ends: 57 [2023-02-13 23:58:06,403 INFO L226 Difference]: Without dead ends: 53 [2023-02-13 23:58:06,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 224.4s TimeCoverageRelationStatistics Valid=1599, Invalid=3102, Unknown=3, NotChecked=408, Total=5112 [2023-02-13 23:58:06,405 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 66 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-13 23:58:06,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 43 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 582 Invalid, 0 Unknown, 3 Unchecked, 6.3s Time] [2023-02-13 23:58:06,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-13 23:58:06,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-13 23:58:06,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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) [2023-02-13 23:58:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2023-02-13 23:58:06,425 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 28 [2023-02-13 23:58:06,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:58:06,425 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2023-02-13 23:58:06,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 states have internal predecessors, (54), 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) [2023-02-13 23:58:06,425 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2023-02-13 23:58:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-13 23:58:06,427 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:58:06,427 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2023-02-13 23:58:06,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-13 23:58:06,632 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 [2023-02-13 23:58:06,632 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:58:06,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:58:06,633 INFO L85 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 5 times [2023-02-13 23:58:06,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:58:06,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112962585] [2023-02-13 23:58:06,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:58:06,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:58:06,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:58:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:58:08,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:58:08,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112962585] [2023-02-13 23:58:08,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112962585] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:58:08,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153843094] [2023-02-13 23:58:08,330 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 23:58:08,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:58:08,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:58:08,331 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) [2023-02-13 23:58:08,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process